Hi,
Go to the Winnebago Web Site, drill down to Owners, Owner Tools, Parts Catalogue, choose your year (2017) and then your model (Sunstar LX) and choose correct sub model dependant upon your serial number.
I know it sounds complex but really pretty straight forward.
This will take you to a 3D rendering of your unit, and you can see electrical and plumbing schematics, and you then can rotate the view 360 degrees, see through bulkheads, flooring and ceilings.
Brilliant tool; takes a bit to get used to it but once you do you'll find it an extremely valuable tool.
This link you get you to the index page;
https://catalog3d.winnebagoind.com/menu/Parts.htm