I recall seeing trailer adapters built like that. The two wires would go to a trailer connector. Never had one though. I think it might have been something that u-haul dealers might have peddled back in the days of hitches that clamped on bumpers. I do have one of those hitches in my pile of stuff.

[on edit] I'd say that one of these is what you have there.

Last edited by klhansen; 12/11/2023 5:10 AM.
Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.