Today I screwed the Approach Systems harness onto the Garmin GTX-327 transponder backplate and then screwed the backplate to the tray. I also crimped a straight BNC connector onto the other end of the RG400 antenna cable and connected this to the transponder antenna. I then wired the power and ground leads and pulled the power from the E-bus.
GTX-327 transponder backplate installed with Approach Systems harness and RG400 antenna cable
RG400 antenna cable attached to transponder located on front right corner of fuselage floor