Roypete

Hi, Does anybody have a PDF on 2013 Montana 5th wheel? I'm looking for a plumbing layout and electrical prints. Presently having an issue with both gray tanks. Kitchen island tank leaks from over the top and bath room / shower tank leaks as well. I can see the crack on shower gray tank, but the kitchen tank is right up against the floor. I can see a flexible coupler for pipe to tank from sink but I can not see vent pipe. First question, is there a vent pipe on top of this tank? I would like to drop tank and repair or replace just have a concern if there is a vent. Shower tank I can see all lines I think. Far as electrical I'm not having any issues I just want a layout of wires in walls and a print if available. Any help would be appreciated. Thank you. Roy 09/02/2022