50-Pack Quick Splice Copper Wire Connectors: Secure and Easy-to-Use Locking Terminals"

"This device offers a convenient solution for adding extra wires to existing wiring, especially in hard-to-reach areas where soldering isn't practical. Made of PP plastic with tin-plated brass terminals, it's designed for safe and easy use. To make a connection, simply slide the connector over the existing cable, insert the new wire, and use pliers to squeeze. The connector's metal components penetrate the insulation of both wires, establishing a secure connection. This method is quick, reliable, and ideal for various applications, such as installing car alarms or radio-cassette units. The snap-lock design ensures that once the cover is pressed down with pliers, it locks securely, completing the connection efficiently."