I have a few sets of coloured led strings (BigW or similar.. can't remember where they were bought). I would like to chop them up into smaller sections. I have snipped the controller off the end and confirmed they work and are 2 ch. The wiring starts with 3 then through the LED's expands to 6 and back down to 4. If they got back down to three... no problem I would cut there. But should I cut them when they get down to 4? Or do I need to trace where each wire goes?