I've attached a diagram of the coax layout for the Big Country. The 2012-13 models are a bit different, but I think this applies to a 2009 (even though your description sounds like you have the newer configuration).
As Dave mentioned, the roof is pre-wired to support a satellite dish installation. The wire from the roof terminates at a coax connector in the UDC (usually above all the plumbing hookups). Next to it is the coax connector for the cable that goes to the living room entertainment center. With a rooftop dish, you need to jumper those connectors. With a freestanding dish, you connect to the one that goes to the living room, which might be the leftmost of the pair of connectors.
If you have two pairs of connectors, one pair will be marked bedroom and the other pair living room. If you're lucky, bedroom and livingroom connectors will be labeled correctly. When hooking up the freestanding dish, try the leftmost connector of the pair marked as living room. The receiver gets connected in the living room to the connector marked satellite. If possible, use an HDMI cable from the receiver to the TV (HDMI carries both audio and video).
Before using the internal wiring for the first time, connect the dish directly to the receiver and get it working. Then hook up to the internal coax lines. If it doesn't work on the first try, assume the labels are mixed up and try the other connectors. You might have to try various combinations. If it still doesn't work, as Dave mentioned, it's not been uncommon to have bad crimps and loose or shorted connectors. The point is that if you don't get it working before trying the internal wiring, you'll be trying to solve for too many problems at the same time and won't know what's really going on.
If you're planning on using a receiver with DVR, things get more complicated because there's only one satellite coax line to the living room and/or to the bedroom. If that's what you're trying to do, let us know and we can point you to other threads where different solutions have been discussed.