earth connction on a generator welder

[Tin Can]

Morning all, i have just been asked to see if i can find out the earth connection for a WM150SP arcgen generator welder, ie positive or negative terminal. It desnt mean a thing to me but if anyone can help it would be much appreciated- Thanks in advance, Mark

 

[Hitch]

I'd put money on it being a female on the machine for both sides. Probably a dinse connector.

Size wise, don't know, probably a 250a connector, but thats just a guess.

 

[Tin Can]

I have just rung my mate for a bit more info and it turns out someone has tried to break into thier yard by levering off some of the galvanised railings and so he has managed to borrow a welder generator from another friend to tack the the railings in place but the torch cable isnt connected and he cant work out whether to connect it to the positve or negative terminal. The mate he borrowed it from doesnt have a clue eihter

 

[Robotstar5]

I'd connect the rod holder to + and work return (earth) to -