They attached it abovethe cabin light to the frame with adel clamps using a bent aluminum peice as a plate. My A&P didnt like it, as it dded pressure to the fabric wich could be seen from outside. The pic is taken sitting in the back seat looking up into the headliner zipper. The cable you see is the aileron crossover cable. You can see the (now patched) antenna holes.Attachment 17175Attachment 17176Attachment 17177