X-Connect XL Eyelet Terminal allows a battery charger to connect quickly to any battery. Replace a lost connector or permanently mount one on your car, boat, truck, or any other vehicle for easy charging. •Permanently mount a battery connection to any battery. •Lie-flat design for seamless installations with M10 (3/8-inch) hole size. •Built-in fuse protection for increased safety. •More ways to charge with plug-n-play accessory changes. •Rugged, watertight connector for extreme environments.