Longacre 52-45749 Battery Disconnect Push/Pull

warning never connect an automotive battery disconnect switch to the positive terminal of your battery why not number one it usually won't fit and number two and more importantly it's not safe this is a sample of a few popular automotive battery disconnect switches some come with installation instructions some do not in any case always connect these disconnect switches to the negative terminal of your battery many people don't realize that the terminals of a top post automotive battery are of two different diameters the negative terminal is about point six six inches while the positive terminal is a larger point seven one inches the diameter of all top post disconnects switches are the same size or slightly larger than the point six six inches of the negative terminal of the battery this allows for easy installation onto the battery as you can see here the disconnect switch fits snug on