Wardai, welcome to the forum. This is a great place to get and share information about our rigs.
I think I can help with your question.
There are two coax wires that run to the roof. These are in place in case the owner wants to install a rooftop dish. They can be found behind one of the speakers in the bedroom ceiling. One of the two wires go to the connections in the UDC labeled for the BR and and one to the LR.
That takes care of one of the two labeled for the BR and LR. One each of the two connections go to the BR and LR.
The other of the two connections go to the BR and LR.
Hope that made sense.
Peace
Dave