Where would I locate a electrical diagram for a SS686 electric range that is 240v single phase or 230 v 3 phase.The terminal block at the service entrance on this unit is wired for provisions for a three phase feed,but it is presently wired for single phase.On the load side of the terminal blocks L1 & L3 are the only phases being used.Each of L1 & L3 consist of 4 wires in each block #1 thru 4.Does it matter which group of wires I relocate to terminal block L2 to convert this range to three phase