I have 2 radios so I have the GMA 245 com panel controlling whatever radio I want to listen to and talk on with the trigger on the Infinity stick grip. I installed a relay so the throttle grip mic button bypasses the com panel and always talks only on the #2 radio regardless of what’s set in the com panel. That way I don’t have to select anything inside the cockpit while I’m in close formation looking outside. I use #1 for ATC and always use the #2 radio (on the throttle) for formation.
https://www.3dstickandrudder.com/shop
TOGA on both sides.
How did you run the wire?