Wasnex told you how you could hook up 4 8Ω cabs to get an 8Ω load on your amp, but I'm going to guess you don't know what series/parallel connection is.
First off the industry standard connection is a parallel connection. If you hook up two 8Ω cabs, that impedance drops to a 4Ω load. If you add a third 8Ω cab, that drops it to 2.67Ω load and if you add a 4th that takes the ohms load down to 2Ω. Your amp has a 4Ω minimum load and trying to run a 2Ω load on it can not only damage it, but if the protections circuits don't kick in quickly enough that will turn your amp into an expensive paper weight. So you don't ever want to try that
The other connection that is possible but very uncommon now is a series connection. When cabs are hooked up in series connections, it adds the impedance of the cabs together. So if you hook up two cabs in series, that will give your amp a 16Ω load and will continue to add the ohms up for every cab you use. So if you hook up 4 8Ω cabs together in a series connection, that will give you a 32Ω load.
That is perfectly safe for solid state and class D amps, but it drops your available power by about 3/4 of what it would deliver into 8Ω. 3/4ths of 1000-watts leaves only 250 watts to be split 4-ways between your cabs which only sends 62.5 watts to each cab...makes no sense to do that. I have an old Sunn 212 cab that has both parallel and serial outputs from the cab. While that wasn't so unusual back in the 60's, 70's and perhaps even 80's, it's very unusual now. The industry standard connection is a parallel connection. So odds are you will need to get a series box to add two cabs together in series.
What @Wasnex was talking about is a method of wiring that is fairly common on internal wiring of 410 cabs. You can run a series connection between two 8Ω cabs and that will give you a 16Ω connection between those two cabs. Then you can run another series connection to the other two cabs, again giving you another 16Ω connection for that second pair of cabs. Finally, you can connect those two 16Ω pairs together in a parallel connection (which cuts the ohms load instead of adding it together) by plugging one pair into one of the speakon connections of your amp and the other pair into the other speakon connector and low and behold, you will end up with an 8 ohm load to your amp. I saw earlier that your amp evidently will produce 1,000 watts into either an 8 or a 4 ohm load, so each of your cabs will actually end up with 250-watts each if you run them all together. And that works. Still a LOT of cabs to carry, but it works.
I actually wouldn't recommend doing though that because it is not only a LOT of cabs to lug around, but your connection sequence using those serial connection boxes in the right place is critical to keeping your amp from melting. If you mess up the connections and forget to use those serial boxes, you'll either end up with very little power, or (hopefully) you'll send your amp into protected mode, turning it off before it melts.
I would suggest that you either run 1 each of a 212 with a 210 on top of it or two of the 212 cabs.
With the 210 plus 212 cab, you will put a 4Ω load on your amp and it will make available all 1,000-watts that it can produce. That will split 500-watts out to each cab. Very few 210 cabs can take that much power. It's more common to see 210 cabs that can handle 300 to perhaps 400-watts or so. Much easier to find a 212 that will handle 500-watts than a 210. I do have a [Invalid or Expired Link Removed] by DNA that handles 700-watts rms (both mechanically and thermally) but that's unusual.
The 210 and 212 stack (presuming they are the same brand) usually sound really good together but you have to be careful not to blow out the 210 if it can't handle the 500-watts. That's why you stack it on top. As long as you are not running distortion through your signal, and you make a point of listening to your gear, you should be able to hear if/when you start stressing your speakers. if that 210 starts making farting noise you need to fix it right now! If you don't, by the end of the song, those speakers will probably be blown. So you put the 210 on top so it's easier to hear. If you hear stress, drop your bass EQ back to flat or lower and if that doesn't fix it, turn down the master. If you are using distortion in your signal, odds are you won't hear your speakers being stressed until it is too late.
You can avoid most of that problem if you have a couple of cabs that will handle 500-watts or more. It's hard for me to imagine a place that you will need more than 1,000-watts going through four 12's. So I'd suggest that instead of buying four cabs, get two really good cabs that will handle 500-watts each. I might add that two [Invalid or Expired Link Removed] cabs by DNA would be an excellent choice.
Here's a shot of my full rig although I only used the 210 at that gig because it was more than enough for this "almost" large room.
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