Simply look behind the shower which would probably be under the bath sink as it is the closest spot to the hot and cold water. My lance truck csmper had shut offs but still needed to be opened when winterizing.
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