Looking for owners Manual

I too asked for similar information from our 5th wheel manufacturer. Couldn't get a wiring or plumbing diagram. I know they exist at the manufacturer but was told by other owners the reason the manufacturer doesn't want to release them is because there is a very good chance the RV is wired and plumbed differently than the diagrams because the line workers have a significant amount of discretion on how it was done because they only have so many seconds for each step. We did get a owners manual but it was so generic that it was next to useless.