Here's a drawing that shows the two pins that need to be connected. I just use a
spade-type 5 amp automotive style fuse.
Connect the Tail/Lic/Running Light connector (upper left) to the Battery Charge connector (upper right)
2015 Jay Flight 32RLDS Elite
2012 Chevy 2500HD Crew Cab LTZ (6.6L Duramax/Allison)
Equalizer Hitch (1200# bars)