Okay so I’ve got a LED cab light set that’s all mounted and the harness is all good to go. The part that’s throwing me now is where can I splice this harness so that the lights come on when I turn on the headlights? The instructions say to find a 12V constant wire and splice them into that, but then I have to run a separate switch which I’d like to avoid if possible; I want everything as localized as I can get it. Can anybody help me with this? Thanks.