Honda 3000is powering a 1999 American Tradition

I am 50 amp, and thought about the "wrong leg" issue. I use the same adapter to go from 50 amp (4 blade) to 30 amp (3 blade) for both the shore power and the generator, so that rules that out. I do not believe there is a bank for me to select because there are only 3 blades, and not 4.