The three main categories of pigtail connectors are RF/coaxial pigtails, fiber optic pigtails, and electrical/automotive pigtails. If you are sourcing fiber optic connectors or automotive connectors for a project, this article will give you the. A pigtail connector is a short length of wire with a factory-terminated connector on one end and bare, exposed wires on the other. It serves as a bridge, allowing technicians to repair specific connection points without disturbing the rest of the system. By simplifying splicing, providing flexibility in tight.