Help needed engine harness

Go to MyMopar. Download the 73 service manual. It's free and it's there because of the efforts of some of the guys right on here. Go to the A bodies diagrams, then keep going PAST the diagrams, and there are charts back there for the engine bay and interior that shows what connectors look like, approximately where they exist physically, and the wire gauge, number and color(s) and their function
Thank you, I’m getting it. I’m learning that you have to unwrap the original harness as the lighting harness is tied into the old engine harness. It’s not plug in play. Takes a lot of time actually. Dealing with old electrical tape. Rerapping, etc. Pain in the *** if you want it to look good.