Yeah, I had the same question....on our Alante 26X, in the cabinet above the sink, there is some sort of video controller which has 4 lights on it for Main TV, Bedroom TV, Exterior TV, and Supplemental TV. I believe that it directs the output from the BluRay/CD player to the desired TV.
Stu & Nina Stoner
Central PA (Lewisberry)
2017 Jayco Alante 26X
2018 Thor Four Winds 24F (traded)
2016 Forest River 22RR (traded)
2008 Honda Gold Wing Level 3