My son borrowed my 26b thor chatuea and in trying to empty the black water tank mistakenly hooked up the hose to a similar looking set up under the passanger side of the vehicle about two feet in from the side. Needless to say when he returned it to me the black and grey water were right to the top filled. Anyone know what the valves on the passanger side and conection point for the black and grey water hose are for......Thanks Bill