The small wire ends that get crimped onto the wire ends to plug into the A-14487 wire connectors. These normally require a special wire crimping tool to install. I prefer to solder these in place instead. Strip about 1/4" of your wire, dip it in flux, stick into the bullet and solder. Then snip off the excess wire/solder or hit with a belt sander. Now you have a good positive connection. U.S.A.