That is an SAE connector. As Tagurit suggests - make sure to trace the wiring back to the battery to determine polarity. Is it labeled Zamp? (View Post)
I see you moved your question from the other A/C thread. Same answer here. The unit is over sized for the space and it helps to crack a window/vent so it runs longer and dehumidifies better. Assuming… (View Post)
You may like to consider a Brahma wheel lock. You can easily steal a teardrop without using the hitch. Throw some chains through the frame and gone. (View Post)