Mine has the coax cable sticking out of the roof on the driver side, it has a round plate with screws and caulking, I am assuming that the antenna fits right over the coax cable and hopefully there is backing under the coax cable plate, is there any way to now how big or what measurement is the backing?
There is a plate in the cabinet under where the coax cable comes through the roof, the plate conceals the 12 volt power and the coax cable in the kitchen cabinet.
Thanks for pointing out the information on page 28 i missed it, it does seem likely that there is backing under the coax cable.