It is just a connection point and wire run from the roof to somewhere inside your trailer. It probably is not connected to anything as it would need a charge controller, fuses, wiring to battery, and panels to complete the system.
And as stated above the wiring is probably not large enough for any meaningful solar system.
Cheers
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2014 Jayco Swift 281BHS, 300W Solar!
2015 F250 XLT 4x4 Crew Cab, Short box, 6.2 gas
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