7 Most of our readers are probably familiar with the solderless terminals shown here. These insulated connectors come in handy when repairing a circuit or adding an electrical item to your car. They allow the joining, connecting, or termination of a wire to a device or another wire. As noted earlier, they can be over-crimped. If you haven’t used these before, it’s best to practice with some scrap wire and extra terminals. They come in many types, including seamed, seamless, with or without shrink wrap coating, and more. Know your connector and how they should be crimped.