I am looking at purchasing the Spoolmate 100 for my Millermatic 175. I do not see any reason to purchase the Retro Fit kit as the Spoolmate 100 comes with the switch and I can build my own connections from the switch. The only connection that I am having a problem with is the 2 pins that need to be added to the trigger plug. Does anyone know if and where these pins can be purchased?