How to use: 1.Slide the RED Ring Connector onto your battery's Positive terminal bolt and the BLACK Ring Connector onto your battery's Negative terminal bolt. 2.Now replace your battery cables starting with the Positive and finally the Negative making certain that there is nothing crossing the battery posts or grounding on any metal parts. 3.Now whenever you want to charge, simply plug the Pin and Socket end of the cable into the Maintainer and kick back. Installation Notes: Disconnect the Negative and Positive Battery Cables from your Battery. Service: if you have any question , please contact with us. Feature: 1.Type: Sae Connector to O Ring Terminal Harness 2.Black (Negative) and Red (Positive) with 15 amp in line fuse. Package list: 1pcs x Battery Charger Extension Cable.