The most common connectors you’ll find in most aftermarket kits are the crimp-on wire taps. These are tools of the devil. We now use Posi-Lock connectors whenever possible, which are a little more expensive, but we are yet to have one fail. With Posi-Lock connectors, strip about a half-inch of insulation from the wire ends but don’t twist the individual strands. Slide the plastic collar over the wire end and then screw the collar and wire into the Post-Lock body to a strong finger-tight. Repeat with the other wire end. This produces a strong, electrically sound joint that is commonly used when there’s not enough room to solder. They are also used as wire connectors in locations where the joint may periodically need to be disconnected. The reason crimp-on wire taps are evil is pretty simple. While you’d think that they would make splices easy by just clamping into place, they can also cut through some of the actual wire strands, making the wire weaker, higher in resistance, and more prone to failure. Additionally, the high-vibration environment of a motorcycle makes crimp splices more likely to loosen and cause intermittent failures which are a pain to track down.