100% guessing here.
Either adapter is probably at least partially compatible with meanwell 3 in 1 dimming drivers. Caveat being the pin outs of the wiring has to line up and full dimming range may not be achieved.
As far as the cmh and to my understanding most other dimmible balasts use a low volt control. I'd choose the A type adapter.
I cut into a uis and other adapter cables and now think because they are using proprietary commutation means hacking this thing is gonna be pretty brute for me at least. There's a 5th green wire that I gather is data so the controller "knows" what device is plugged in (note the icon that appears when port is in use). So, if they are smart at all about being "proprietary" there won't be any pwm output if the controller doesn't receive the right info. They gave me some info in my email request but nothing that isn't on their website, the Frontline CS reps cant/don't/won't provide enough info to hack the devices.
I've got the B type adapter, in theory I should be able to measure resistance across 2 of the 4 wires in their rj11/12 cable that is included with the adapter. Jumping to more conclusions this same cable is what's included with the A type adapters and the pwm signal goes over two of the wires and the low voltage is the other two.
Proceed at own risk, smoke does not go back in.