Hello all, I'm another proverbial "newbie", and I'd like to thank the Forum for allowing me in. I'd also like to thank all of the members in advance because I will be needing some advice on occasion. We have purchased 2018 Rockwood 8298 WS Fiver and I have a question about it that I hope someone may be able to answer. We did a very fast PDI when we picked it up and I don't recall what this white switch above the control panel is supposed to operate (see photo). If y'all could help I'd be forever grateful!