Connect the pigtail wire to the electrical outlet or end device by tightening it with a screw. But you have to loop the bare wire around the screw terminal first. It ensures a secure connection by combining wires with a wire connector, like a twist-on connector or a wire nut, and then linking them to the intended terminal or fixture. An electrical pigtail is a short length of wire used to connect two or more wires. Why does this matter? Modern systems demand precision. This. The good news is that pigtail connectors work for automotive, home electrical, and furnishings projects! Ideally, they are the perfect remedy against faulty or damaged wire connections or broken joints and are much more practical where interruptions or electrical defaults occur.