Industry has been boasting "solar ready" on many new RVs. Often this is nothing more than "solar prep" for the buyer to add Solar Later. Your MFG may have supplied something about this syamstem in the manuals, but they are often nonresponsive after the sale. I don't know about your set up, but I have found that usually service guys at Selling or Warranty Certified service providers fir that MFG are the better source that hut or miss inquiries. I just went through a very similar QUEST to get information on a Riverside RV mystery plug that was rumored to be a Solar hookup... and the mfg was nontesponsive and useless in helping me. I got my answers finally from service technicians at their warranty (selling) dealers.