2007 was on the cusp of digital versus Analog switchover. Below are the 2 used in 99% of RV's back then. THEY swap between Cable and OTA. The wall plate type adapter is usually no even close to the TV's and can be anywhere in the RV, but usually up front in the Dash overhead area of your older motorhome. IF your RV has Current Digital LCD TV's then over the years someone may have removed the Antenna switch/booster system. Doug
https://www.summitsource.com/Winegard-VS-5312D-RV-5-IN-3-OUT-Video-Distribution-Selector-Switch-Channel-3-4-Modulator-with-DVD-Loop-Thru-Camper-Satellite-Dish-Off-Air-Signal-TV-Antenna-Channel-Part-VS5312D-VS53DVD-VS-53DVD-P8058.aspxhttps://winegard.com/products/accessories/wall-plates-power-supplies