WBGO has a pretty good schematic of systems on the web...there are diagrams of plumbing, electrical and so on - see below:
Go to
www.winnebago.com
Click on Owners on the top menubar
Click on Owners tools
Scroll Down Click on Research Genuine Winnebago Parts/Parts Catalog
Click on your Model Year and find your model and floorplan.
Another alternative if you have a fiberglas roof: many installers are using double-sided VHB tape on the mounts covered with Dicor. I have 8 panels that have been in place 5 years without problem.
And ... you can also call WBGO direct and their folks are pretty good about answering questions.
My bottom line: diagrams and descriptions of what might be where are not always accurate - be careful drilling / cutting holes in the roof.
And welcome to a new set of friends! Questions always welcomed...