[widebody911]

I've validated that the red and black are each 110v hot, but what I can't figure out is where the white (neutral) goes.

I did some googling to no avail, so I hooked it up like it says to hook it up, with the hots on the blades and the ground to the other terminal, with the neutral just laying there unused. The welder will power on, but I haven't tried to use it yet.