That's clearly their suggested placement, but here's someone who decided to go with the ATM350 because he didn't like the limitation of that mic clip:
You can actually buy a spring clamp type clip:
DPA CM4099 Instrument Microphone Clamp Mount
I just got a used DPA 4099 and it didn't come with a clip for bass so I'm trying this type of clip first.
They end up using it here:
Choosing the Best Mic for Upright Bass – with Sound Samples - inSync
Since I didn't have the right clip for it, I found a rattle free way of mounting it in the bridge heart so I could mess around with it.
It is on a gooseneck so it doesn't HAVE to be placed as in the picture. Personally I'm feeling like I might want a little more proximity to the f hole but it's early days, which is why I was curious to hear what other people were doing. Thanks to all who replied!