[bestgenman]

For what it is worth, connecting a water hose to the flush fitting near the top of the tank became too unhandy.  My fix was to extend the garden hose fitting to the backside of the door.  Now it is easy to access and there is never any fecal matter at the connection.

This picture is a bit difficult to see the whole connection scheme but the involved parts are a handmade aluminum bracket with the female hose connection, a piece of tubing, and a king nipple screwed into the port where the old female garden hose resided.  Richard’s picture shows it perfectly.