Recently I attended a SCCV driving event. Part of their pre-event inspection is verification of a cover for the hot battery terminal. I checked my car a few days before, and realized the positive battery terminal was not covered. I spent a minute thinking of all the possible ways the positive terminal could be accidentally shorted to ground. If nothing else, when working on the car, a wrench or other tool could easily be accidentally dropped, causing a direct short.
The positive terminal is just a few inches from the aluminum A/C lines, the inner fender, and numerous bare nuts and bolts. I can understand the concern, the battery could easily be accidentally shorted out.
I went to the local auto parts store and bought a pair of universal battery terminal covers. I had to cut it a little to make it fit my car. Just for good measure, I used a red zip tie to hold it in place.
I passed the safety check with no issues, they checked to ensure the battery was securely held down, that the hot terminal is covered, the front end was tight, and there was nothing loose on the body of the car.
I have also decided that the hot terminal of all my cars will be covered, as an extra safety measure. The $5 spent for terminal covers is cheap insurance and piece of mind. These covers can easily and quickly be removed for display on show cars.