Yes, the one new wire shown on the bottom right of my drawing is a coax cable output from the satellite box. This wire carries the satellite output on channel 3 or 4 and needs to be combined into the system. You could add or modify a wallplate to be able to connect the cable. I ran underfoot since I did not have a good location to mount the sat box by the LV TV.
2012 Sabre 32QBTS - Triple slide bunk house, Propride 3P Hitch
2005 Excursion - lifted and heavily modified