I have a 2015 Vista 27N. The entertainment compartment has 1 HDMI cable that feeds the main inside TV. Mine also had a component cable ( R G B and Composite Video plus L R Audio that goes to the outside TV. No HDMI to the outside TV. The outside TV on mine has an open HDMI connector so I added a HDMI cable that is stowed in the outside compartment that I can connect my laptop to outside.
I also now double feed the component signal to both the outside TV and bedroom TV using a component signal splitter I found on Amazon and audio signal splitters. Works great. I drive the Component cable with my Dish Hopper 3 Sat Rcvr, that has both Component and HDMI outputs that both work at the same time.
Randy - Manhattan, Kansas
2015 Vista 27N
2020 Ford Escape Hybrid