When I was trying to find an HDMI connection in 2012 for our iPad to run on the old coach TV, I could see and access behind the TV by doing what Steve instructs... the vent in the upholstery on the windshield side. I found I could not only get to the TV’s HDMI input (the only one on any device back then on our ‘06), but could see the braces the TV mounted to. Somehow at the time it had escaped me that by simply popping off four upholstery buttons, I could unscrew and remove the entire panel that the metal vent was on, and get much better access. That’s how RV Outfitters in Bend replaced the TV and remodeled the cabinet 4 years ago.
Joel