The right side of the assembly is the switch that turns the light on when you open the door. Is the connector attached to the bottom of the assembly or just looking like it? can't imagine what it is for as a fan would need two leads. Have you found a manual for that unit on the Dometic site?
2018 Ram 1500, 2020 Cougar 22RBS
Just the 2 of us and 2 Jacks on the roam.
Meet us at Olympus Mons. Gone Traveling.