Thank you the deck fill is in with the cockpit sink, unusual place against the bulk just hoping it is not under the cockpit. Will look further.
On my 1997 45 fill is in the same place as yours. Tank is on centerline under stairs. Access point for hoses is under bed in guest stateroom.
The water tank is at the bottom of the stairs centerline. You should be able to see a portion of it in the storage under the galley