Onan generators usually have a rather hidden circuit breaker in the generator itself. On my 3600 (LP, 4000 if gasoline) you remove the cover and it is located down low, and is a toggle type, that pushes away from you/toward you, near the starter switch. Very hard to spot.
Many motorhomes also have the "manual" transfer via a receptacle you plug your shore cord into.
Always plug the cord into the receptacle when storing it, then if you stop midday for lunch, you can run the generator if needed, without having to make a special trip to the cord compartment to make the connection. Just make it a habit to ALWAYS plug it into the generator, you cannot go wrong.
Charles
