"RodHatter".....Your coach is using a manual connection system that was used for years before the automatic transfer switch became the norm. Your power cord, when used at home or a campground, plugs into power and supplies the coach. That female plug you're seeing in your bay is the same as the campground or house plug, it's just connected to the generator. As a standard procedure, whenever you diconnect from shore power, you should plug into the outlet in your bay.
Now to your issue. Check your generator for a circuit breaker. Often they are tripped or turned off. On my older Fleetwood, I had a switch inside that had to be thrown to get power to that plug in the bay.
Don & Mary
2019 Newmar Dutch Star 4018 - All Electric
2019 Ford Raptor Crew Cab