If it is like my Windjammer, one of those is a line that runs to your bedroom TV area so you can connect satellite from your main receiver area to your bedroom. I have a DirecTv SWiM splitter behind my DVR receiver and connected the other end to a different receiver at my bedroom TV so my kids could watch one channel in the living room and I can watch another in the bedroom. I went a step further and put another splitter in the bedroom and installed a third receiver for my outside TV. I can watch three different channels at the same time if I so choose.
Do you have two coaxial connections at your bedroom TV? If so, what I explained is probably the case. Most TV locations will only have one connection that is shared for OTA and cable TV.
2016 Rockwood Windjammer 3029W Diamond
2015 Chevy 3500HD LTZ 6.0 Crew Cab 4x4 Long Bed 4.10:1 SRW