Phranc,
Off door side I do not have the in line shut off valve. This is the shower (hot & cold) water with quick disconnect inside the docking center right ?.
I have full access to the backside of my docking center on my 3200 rl. In fact, I removed all of the screws holding the 2 x 2 carpeted clos-out panel and installed Velcro so that no tools would be required to remove the panel for whatever reason like winterizing.
I stapled the Velcro to the 2x 2 carpeted panel and also to the framing.
Gary F