I have a 2017 Keystone Cougar 28rls. In the manual it talks about two ways to fill the fresh water tank. One of them is the "Pressure Water Fill" method. To do this you hook up your hose to the city water fill valve then turn a valve to the "tank fill" position,turn on the water and fill your tank that way. The other way is the normal gravity water fill. My question is this - where is the tank fill valve located? I have looked all over the bottom of the trailer and all that is there are the drains for the water lines and the fresh water tank plus a few wires. I looked under the bathroom cabinet because it is right over the fresh water tank but there were no extra valves there. And I looked in where the outside shower is but there was nothing there. Does anyone know where this valve is?