2000 seafarer 226 cabin Sink

[P28443]

Just bought a pre owned 2000 seafarer 226 through estate sale. Owner passed away so I'm figuring out the boat on my own. Owners manual is no help with details.

Question: How/Where do I fill the tank for the cabin sink?

 

[Strikezone]

The fill for the freshwater tank is beneath the port side helm seat. There's a screw type cap (same as gas cap). Without looking I believe it is below the foot rest. Holds 10 gallons of fresh water. To actually get the water to come out of the faucet in the sink you have to turn on the Water Pressure switch which is located in the panel with the nav lights, horn, wiper, etc.