Where is Marlin 30 holding tank?

[Graybeard]

Hi guys
I need to replace all my sanitary hoses because they really smell. I’m guessing the access for the holding tank is under the aft birth. But I don’t know, can anyone fill me in? Thanks

 

[Fishtales]

mine is there. it is a plastic decent size white box..

 

[Island Pilot]

Mine is also under the aft berth.

 

[Raven1708]

Here is a pic from mine that i am going through.