without a picture of your hitch and wiring connector, I would 'guess' that it's the typical
7-pin connector, which is pretty standard for any hitch that potentially is for towing a vehicle, like a toad.
you'll find that most any wiring harness between the RV and the vehicle, like the BlueOx wiring, will be 7-pin for the RV end and 6-pin for the vehicle end.
if your wiring for the vehicle's tail lights are like mine, BlueOx, then the wiring goes directly back to the tail lights, with their own additional bulbs, controlled by the RV.
'14 Thor Palazzo 33.3 compact diesel 100k+miles since '14... US, Alaska, Canada...
AND a '14 Gulfstream Amerlite
AND a '07 ForestRIver Rockwood