Underneath I would be looking for either of these: (1) a small spigot next to a fairly small protruding tube that allows the water to drain...turn it counter-clockwise to open, or (2) a 3rd pull-handle underneath similar to your black and gray pull handles. If your rig has #1 the water drains in a steady flow so get yourself a cup of coffee or do some chores while you wait. If itโs a #2 the water will come out in a gush. Either way itโs just water so I do this operation at the end of the season in the driveway when I am winterizing.
Welcome to the RV.net forum, KennyBoy.
2011 Chevy 2500 Duramax diesel
2019 Timber Ridge 24RLS (Outdoors RV)
Go Cougs!