Installing a male 7 way in the truck bed

Hope you get it all figured out easily as we did. We were lucky as our 04 Chevy had the 7 way RV plug in the bumper all weird up and the camper wires were zip tied to the frame between the cab and bed right where we needed them. Amazingly after 10 years of being a work truck and never seeing a camper the labeling was still legible and even more amazingly our 90 model Shadow Cruiser had an unaltered plug end and the owner's manual still in the camper had the wiring diagram in it. Wires different colors so we just matched function to function according to both diagrams and everything worked first try. We don't have an onboard battery so that wire is just taped off. Sometimes you just get lucky.