Here's a link to the parts manual with some diagrams that may help (see pgs 83-84):
https://www.winnebago.com/Files/File...9/99wfl35u.pdf
Sometimes the parts manual has more details than the wiring or plumbing diagrams.
For some reason, the link to the plumbing diagram only shows a graphic of the drainage system so it's not any help. I checked the link for my 2002 Suncruiser 35U and it also only shows the drainage system instead of a full plumbing diagram, which was there in the past. Winnebago has had some recent problems with their links so, hopefully, they'll fix it.
Here's a link to Winnebago's owner support page. You should download everything you might need (owners manual, wiring diagrams, plumbing diagram when available, wiring identification guide, service tips, etc.) so you'll have access even without the internet. All the wires in your MH should have a code on them which is listed in the wiring ID guide, so it's especially valuable.
https://www.winnebago.com/owners/owner-resources
You also might want to go to the User CP in the toolbar and create a signature like mine that shows all the details of your MH. That way, if you forget to mention it in your post, we'll know what you have.
Good luck and let us know how it turns out.