The incoming ground would connect to the ground buss on the blue sea panel. Hot (Black) and Neutral (white) connect to the main breaker. I believe that the ABYC does say connect the AC ground to
Boat ground (engine, etc) which normally is also the DC ground.
However some folks think thats not so great. From a personal
safety its good, but the AC harmonics can sometimes disrupt DC
electronics connected. Plus it assumes that all other boats are wired the same way, Not going to happen in the real world.
Me, except for the
Battery charger which for me is normally off ( I've Solar), my AC is completely separate from the DC.. I know cause I've wired it myself. Sometimes the AC ground WILL connect to the DC via the
battery changer DC negative, but YMMV