You can cut one or two of the bullet wiring connectors off and feed the wires through the hollow bold and reinstall new ones. I do not know why the harnesses are made with equal length wires on the harness end. You can not feed three of the connectors through the bolt at the same time. If they were slightly different in length you can get them in the bolt.
The light bulb sockets do not come with the harness (reuse old )so make sure the harness comes with the small mushroom shaped connectors (do not need to crimp)and enough to do all the bulbs. when soldering electrical wires use rosin core solder, Radio Shack has the good thin solder.
Tyree: 804 556-5200
2693 Crewsville Rd.
Bumpass, VA 23024