Hi Larry, thanks for your interest.
Yes, the outlet is wired to the output of the generator.
The generator runs at 50hz, not sure of the voltage yet as the engine needs attention, so I've only managed to get 72 volts out of it so far.
There is a circle on the outlet which reads 25/300, which I assume to be 25 amps/300 volts.
There is a plate on the generator, which, roughly translated suggests that the 115v outlet should be used for light/heat only, not for motors - but I think that is the round 2 pin socket.