This will work up to a certain point, though pretty ballsy making a 12ga fit the power side of the pump the drop down of the pin will overheat as it starts to demand masses of the pump.
This is why in fuel hats you see them move to different style connector, one that has a thicker male/female pins.
Still has its use however is not the saving grace to connector melting, it will still overheat over time.
We're entering a phase in the car world especially in the Z world where many have though of a lot especially on high current demanding circuits.
