Your on the right track Donavon. Ideally, it'd be nice if Winnie had plumbed a line from the shower feed over to the black tank sprayer, because that's what I'm trying to create.
Issues to deal with:
a.) the metal panel holding the black tank sprayer GHT fitting is pretty close to the flip up compartment door.... may need an elbow or tee in all this.
b.) quick disconnects would certainly be nice, but the hose from shower is a weird size, I think 7/16" ID. Maybe with heat it would open up and be able to get pushed on a QD fitting..
c.) I'm leaning toward doing some of my own hard plumbing with tubing, tees, three way valves, etc. and do it "behind" the control panels, leaving the shower hose & shower head alone, and leaving the option to still be able to use a garden hose on the black tank sprayer.
d.) I don't know about everyone else, but I rarely use the outdoor shower. It's nice to have though, so I gotta keep the option to changeover quick-n-easy.
signed, Still Dreamin'