Wire gauge! I had to reterminate an 8 gauge power cord. The manufacturer takes out the screw clamps and solders to the blades. If you have large wire be wary, Wattgate and even Oyaide only take up to 9 or 10 gauge. Oyaide was easier than Wattgate-I've done both. I had to enlarge the holes on the Wattgate plastic to allow the 8 gauge wire to fit through properly. Also when reterminating consider cutting off the existing exposed wire, strip back a new length of exposed wire and make it shiny with fine gauge steel wool or sandpaper and then treat it with Pro-Gold or something. Check and double check with an ohm meter that you have no shorts and have proper polarity with hot, neutral and ground. Good luck!
ET