I have a new to me (end of last year) 2004 Mainship 400. Still learning about the boat and systems. I have the transom fresh water wash down system in the stern locker. It has the plug in coiled hose with a spray nozzle. My problem is I cannot seem to get the hose to lock into the receptacle in the locker. Almost seems like it is not the right connector on the hose but I suspect it is original to the boat. Anyone have similar issue of a fix for this? Thanks! Joe