I'm not sure I would trust a set of plans made for a specific model. As the construction goes along so soul some minor changes that don't get changed on the master plan. Therefore, thinking a pipe/wire is in one place as you digging for it, you may find they found an easier way to route it when they built it. Best way I would say is take a tour of the manufacturer ad watch where they put stuff.
Chuck and Joanne
2014 Flagstaff Super Lite Classic 27RLWS Emerald
2013 Dodge 2500 4x4 Laramie Crew
Equal-i-zer 1200/12,000 4-point WDH