1. Start by removing the factory lamps. Cut the connector off the harness and leave yourself enough wire to work with. Cut the connector off the new harness and splice/connect the old connector with the new harness. I chose to solder and heat shrink my connections, but you can do as you like.
DOHC,
Did your tails come with a new harness? As far as I can tell, they come tail lamps only? :shrug: