Hi Gaugeguy and Welcome to the Forum!
This old Winnie Brochure might help a bit:
Shows standard and optional equipment. Says you have 12v AND a 110v wiring so there should be some 110v outlets inside. Keep in mind they will only work when you are plugged into 110v "shore power".
On Class C motorhomes like yours, there are typically 2 batteries up front, under the hood. One for the engine/chassis and one for the coach/house. If you only see one battery, check for an empty battery tray. If you cannot find another battery or a spot for one then the switch could be that you just have one battery for both uses. If this is the case, it is a VERY bad idea as you could run down the battery while camping and not have enough juice to start the engine.
Hopefully, someone will come along who has a Winnie like yours and can shed more light on your questions.
Enjoy your "new" motohome!