thanks for responding so quickly
there are no external wiring but i know how to connect the main power wire to the switch, my real worry is how to connect the ground cable which you clamp to the material to weld and the one you put the rod into. there is a 12 step control from 40-225, from 160-225 are disconnected from the transformer but is still attach to the step switch. i would like to know where to put those two cables, also the wire that attach the step switch to the transformer. hope you can unravle this mistry