beneteau 373

Good day, I have an Icebox with a plate in it and a fridge. It all runs on a single compressor. I just purchased the boat and the previous owner had a new compressor installed as the old one was no longer working. On the plus side, the icebox definitely freezes things and keeps things cold...

I’m doing my first winter living on a 373. I have all my systems ready for cold except for wash down. It looks like it might come through the toilet intake seacock but there is no shut off independent of head that I see. Any information would help.