05 Seneca grey water tank leak

[tonost]

So I'm at the end of my rope with this one, I have an 05 Seneca that the previous owner ripped out the shower and installed a mess in it's place so I replaced it with another shower and it's leaking somewhere after the shower drain. The tank isn't leaking because I can run the sink and it doesn't leak. I have run an inspection camera under the shower pan and it's not leaking at the drain. Where can I get access to the grey water tank to figure out where the leak is?

[WinnieView]

The sides of the tanks can be partially seen by looking up and behind the valve panel in the wet bay, and more access is available by removing the rear wheel fender panels.

[tonost]

Are you talking about the fender panels up behind the rear wheels?

[WinnieView]

Yes.

[Sundancer330]

I would call a plumber/sewer cleaning company since they use snake scopes to inspect sewer lines, they can send it down the shower drain all the way to the tank to locate the problem the previous owner left you.