On the Stryker 955v2 the main circuit board where the mic jack plugs into.I know there marked 1-4 on the board it self now 1 is that still audio.
There not labeled on board but found that #3 is the audio on the main board1 - shield
2 - audio
3- tx
4- rx but rx may not be used.
It's the standard 4 pin galaxy cobra
These are the mic pins though, you'll have to trace them on the radio board because they may have them labeled different, I don't know.