I own a 2006 Holiday Savoy that I ordered new from the factory. The large Red and White wires are the factory prep for Solar Panels and the companion small red & white wires are the companion wires for the solar panel voltage monitor for the charge controller. The other end or the four is either under your air conditioner cover or the refrigerator vent up on the roof, they could be either place and hooked to nothing. I never added solar panels so mine still hang bundled up also. The whites are all tied together at that frame stud that is the common ground point for the whole trailer.
