I have a Garmin GTX 230 Transponder on my panel and went to hook up the coax to it the other day. I was surprised to find that the back of the transponder had a BNC jack I was unfamiliar with. As it shows in the picture below, it has a flared out end and no pins to lock a mating termination (like many bayonet type). Is my assumption correct that this is just a friction fit without any locking the cable in? confusing with all the vibrations we encounter. What am I missing?
BNC Transponder.jpg