I had a similar hidden switch all the way back in my Flagstaff 5th wheel... All by itself haha... I would flip the switch off-and on every now and then and nothing would happen..
One day the wife came in and said the big light on the back side of the 5th wheel was coming off and on.... That was it.... My outside scare lights haha... You would think this switch would be up next to the patio lights haha...
google image...
Roy Ken