Garmin recommends a relatively short distance for the ADSB antenna cable for my 45R. The location under the baggage compartment meets it; the location in the tail does not. It might be ok in the tail, but. I shortened the Van's supplied coax to the baggage compartment antenna location and reused the rest for comm antennas under the seats. I put a dummy transponder twig antenna in the tail to fill the hole.