Look underneath below the tank and there will be a plastic cap screwed onto a plastic pipe sticking out from under ...just unscrew it ...
Bit of advice ...have a friend or neighbour that has winterized before to show you...and do not fill water heater...use the bypass...
It was a rainy few days at Algonquin Prov park...tarps kept us dry.
Wayne --Belle River (Windsor), Ontario
2013 Sunset Trail Reserve 25RB..
2015 White Chev Silverado 2500HD 4x4 (6.0 l gasser)
2003 Mountain Star 890SBRX Truck Camper