I attached a small piece of iron to the top of the bracket (non-iron) that holds the awning to the edge of the roof. The Sirius antenna is magnetic and strongly holds on this piece of iron, but I zip-tied it to be sure. Then simply ran the antenna wire down a few inches, through the top corner of the side door (it did not interfere at all with closing the door), into and through the false ceiling, down the A-pillar on the passenger side, and finally kind of snaked it under the bottom of the dashboard and attached it to the small Sirius receiver, which I'd already installed with the receiver bracket. It really was very straightforward, very easy, and the wires are totally out of sight inside the coach.
