Electrical lugs function as a type of wire connector that connects wires to a device or to another wire. One end of the lug attaches to the wire through crimping or soldering, while the other end of the lug links the wire, establishing an electrical connection. To make the connection, place one end of each wire in the connector. Next, place the connector in a crimping tool and squeeze the handles of the tool to ensure that data transmits through the connector. Make sure to choose the material for wire lugs that match the material of the wires. For copper wires, use copper lugs, and use aluminum lugs for aluminum wires. Older homes and buildings tend to use aluminum wiring, while modern homes typically use copper.