I tried to tag on to another post but figured I'd just post my own thread. I upgraded my headlights on my 68 Newport. They are very dim. I bought a headlight wiring harness with the new relays. The initial install looks easy and straight forward. I just don't know where to plug it in to the system. I was advised follow the headlight wires back to the firewall. I did that. Not really sure what I'm looking for to disconnect. I tried searching my FSM but not sure thats the best resource for trying to install an aftermarket part. When I follow it there is a black box full of wires along the firewall but otherwise I have no idea what I'm looking for to disconnect to connect to my relays. Anyone have a pic they can point out to me? I'll add a picture of my relays. They came with no instructions.