Your coach should have a satellite connection in one of your bays, usually the power bay. All you need to do is connect it there. If you haven't changed the interior cabling it will work fine. If you have, just fine the cable that comes from the bay and connect it to your sat receiver and you're done!
The other option, if you don't have a cable connection in the coach, is to run a new cable up the "A" pillar of the coach to the sat receiver. Stub it off wherever it's convenient to connect the Tailgator. I would remove/glue down any cables on the roof.