Jeff,
I believe the control cable is coiled up in the roof above one of the ceiling speakers in the bedroom. Carefully remove the speaker grill, then the speaker that is rear-most in the coach bedroom. Above that, I believe you will find 2 coax cables and the control cable.
Of course, the control cable goes to where you found the other end. The 2 coax cables terminate on a wall plate in the UDC.
The premise on stubbing the control cable above that speaker is that you are installing the Winegard Trav'ler (automatic self-pointing dish) on the roof - as-designed). So you would drill a hole above that speaker, run those wires out the hole, seal the hole and run the wires to the dish.
Let us know what you find.