Review on Schumacher Battery Charger and Maintainer Cable Connector - Quick-Connect Ring Terminal for Effortless Connection by Stuart Dunn

Please note mine did not come with red/black wire but because black wires and loop ends were shrink wrapped red and black color coded ends. They were upside down/wrong. On the first connection I had a short circuit. Put a voltmeter on it to check. If you have color coded ends like mine, check before applying power. Problem solved by correctly applying black and red paint to ID +/-.