My boat has a fish hold just aft of cabin door. Its drain is tied to thru hull with a ball valve (seacock), I guess with the intent of this being a livewell? I never open this valve at sea and the box seems kind of useless to me. Has anyone modified this hold to add a macerator pump? I presume I would reroute discharge to a new thru hull above waterline. Anybody else do anything with this box? Thanks. Craig.