We have a 2018 Bighorn 3760EL. When we picked it up at the dealership and we did the PDI with them I saw a small switch on the left side of the control panel that was not marked or identified. I asked them what it was for and they did not know. We could find nothing that it operated. Does anyone have any suggestions on how I can find out what this is for ? We are now full-timers and this is only our 3rd day in our new Bighorn and we love it so far. Thanks in advance for any help or suggestions.