Mystery bathroom switch

Well the rig is at the shop for dry rot repairs so we may never know but as far as I can tell there is no night light in the bathroom, I do not have heated tanks, it does not effect the water heater or the water pump and there does not appear to be any power going to it. I have a driver side spot light but it is operated from the main controle panel.

I called Warrior Lifestyles and they said to send them a picture of it. I dont have much faith that will help but when it gets back I will follow up with them. For now I will just assume it is for an option i dont have on my trailer.
Eric