AutoHarnessHouse|Plug and Play Car Wiring and Audio Gear The 20-pin Jumper Harness has the Subaru 20-pin female connector on one end and 20-pin male connector on the other. One end will connect to the factory harness and the other to the connector on the back of the head-unit or navigation system. This prevents the need to cut or damage factory wiring when adding an aftermarket amplifier or subwoofer.Subaru · Store · Tutorials and DIY · Jumper Harness · Contact · Ahh-70-7552 Wiring Harnesses | 1200+ Products - CARiD wwwd››Electrical Parts›Wiring, Cables & ConnectorsFull selection of Wiring Harnesses at CARiD. Lowest prices. In-House Experts. Easy Returns. Call (800) 505-3274 or Shop Online.