You don't mention which model Adventurer, which could be relevant. Your best bet is to check out the wiring diagram at Winnebago's site:
Sometimes, the links don't work and you have to "open in a new tab".
The transfer switch wires should be pretty clearly noted on the diagram for your model Adventurer (they are for my Suncruiser 35U).
You might want to add a signature block to your profile like mine so that, every time you post, we'll know your year/model/floorplan, etc.