Minn Kota MK-BC-1 Battery Connectors 
For installing batteries in tight, confined spaces, the design of these connectors is perfect. They're easy to disconnect for quick, convenient changing and a plastic cover eliminates the risk of electrical shock. Fits post-type battery terminals (will not fit on threaded posts).
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.