As long as you can open the Neutrik speakon end by unscrewing it, you can be successful. Read the manual ( Mono Bridged Connection) and look for the fine print - it will tell you what each end should be wired too.
You only need to rewire one end - the speakon connector that goes to the amp. The other end is already wired correctly - this end goes to the speaker.
For the amp end
The speakon connector has the lettering and numbering already on it. Pin 1+ is (+) and Pin 2+ (-). All you need is a Phillips screw driver to loosen the screw holding the wire in place. Move the wires to the correct "numbers" as I told you. Boom, done. It's really easy to do - make sure you mark which speakon is for the amp - duct tape works great for that. Seriously though, I did it on my first try and this is coming from a dude who ended up melting EMG Tone Pots with a soldering iron twice!
Save your money - this is brain dead simple to do. Have a flashlight or really good lighting to see the numbering on the connector.