Tommy, I did a real quick look at your request and think the following connections are correct, but double check.
P2401
Dynon audio out/hi pin 10 to GMA Com 1 audio in/hi pin 9
Dynon audio out/lo pin 9 to GMA Com 1 audio in/lo pin 10
Dynon PPT pin 5 to GMA Com 1 MIC key out pin 12
Dynon MIC pin 1 to GMA Com 1 MIC audio out hi pin 11
Dynon MIC lo pin 2 to GMA GND
I know this is an old thread but I just want to make sure this worked out. I'll be wiring the SV 425 to the garmin GMA245 and I'm struggling with the diagrams different wording.
I'll be wiring this to com 2 and I'm questioning the pinouts