Not sure about yours, but our 2004 Designer has the generator switch right above the thermostat, and it is clearly labeled. We don't have a generator - just the factory generator prep with wires and an empty compartment in the basement.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.