First let me say, I have never looked close at a Montana High Country. But I have to assume it is wired similarly to regular Montanas. The "Living Room Satellite" connection goes to a connector in the entertainment center area. It is a direct run without any splitters. You should cable the receiver to the port and be good to go. Montana has a history of bad connectors and swapped cable ends. If you can, check the continuity (a tone device is best) to ensure you have the correct cable and it is intact.
Here is a picture of the wiring for TV, satellite, and cable in a Montana.