Access to Shower Drain Pump

[Howler]

On our recent model Beneteau Oceanis, there’s a slow leak somewhere in the freshwater system. By elimination, I suspect the shower drain. There’s no apparent way to access the gulper pump and associated hoses. Does anyone have experience accessing this plumbing on a recent model Beneteau, Jeanneau, Dufour or similar production boat (I assume they have similar setups)? Thanks!