Hi, I just took delivery on a new Eastwoods Mig 35 welder. The instructions didn’t really say how to put it together. Most of it was pretty simple, but what I beleive to be the 2 elecrical connectors for the trigger, have me concerned. Does it matter which one goes where? Is it simply a case of pulling the trigger completes teh circuit and it doesn’t matter which one goes to ground, and which one is posative?