There is a lot going on inside the metal pigtail box where the wire to the truck (pigtail) connects to the camper regardless of 5th wheel or travel trailer.
While the wire color of the pigtail itself is pretty standard across the industry, the colors used on the camper side change according to the winds it seems.
If you ever do a factory visit, you will find that the camper wiring colors vary only by amperage rating and used for just about everything.
For a example, all running, brake, and turn signal wires may be white paired with a white with green stripe.
If you take off the cover and spread everything apart, take careful note of what is connected to the color coded pigtail wiring and, using masking tape, label the camper side wires as to what they are.
I needed to fix an open ground wire in that box and let me tell you it was an experience.
Lou, Laura, & Freya the wonder dog
2008 GMC Sierra 3000HD Crewcab SB Allison Duramax
2019 Flagstaff 8529FLS - Pullrite 3300
HAM CALLSIGN - KC3FFW