[snowbirds R us]

After I drained the black tank, I hooked up the water line to the black tank sprayer fitting. Turned on the water and immediately water started raining down from the top. I have taken off the white covers in that area and found the lines to go straight up into the wall behind the shower. I can't exactly see where the water is coming from or where the lines go, but I can see it spraying when I look through cracks in the wall. How does one access this area to do repairs? The only way I can see to do this is to pull the shower out. Hopefully there is a better way, if not I will probably have to disable this feature. This unit is an '08 3400RL. Any ideas folks?