It is easy to figure out where the fresh water tank is-just below the fill port. The black tank is easy too-just below the toilet.for the gray tank, look in the cabinets for an inch and a half pipe goes down through the floor and that will be where your gray tank is.
2018 Ram 1500, 2020 Cougar 22RBS
Just the 2 of us and 2 Jacks on the roam.
Meet us at Olympus Mons. Gone Traveling.