On my 2000 P32 Adventurer it is on the left hand side of the steering column. It is above the wiper control module that is flimsily hanging from the steering column. It is very hard to find even after having hooked up to it several times. I have a driver's side door so that helps a lot. If you don't have one it could be hard to find.
2000 Winnebago Adventurer 32v, P32 Workhorse Chassis 7.4l Vortech, J71 Ultra RV upgraded 67,000 miles