I wanted to wire an easy hook up for both a battery tender and an air compressor for the GT4. This car will be stored part of the year so having a battery tender is a good idea. This car will also be tracked so having an air compressor for my air ups and air downs is needed. The GT4 battery is under a plastic fascia in the frunk and I didn’t want to have to remove that fascia each time I needed to hook up the battery tender or air compressor. So I bought an SAE battery lead that was 10 feet long, wired it to the battery, and then it passes through a hole (that preexisted) in the frunk so I can access it. The lead has a 30 amp in-line fuse to protect the battery from a short. I then had to cut the alligator clips off of the air compressor and change that to an SAE style hookup. Now I can simply open my frunk, hookup the air compressor, and air up. For the battery tender I am using the same SAE lead off of the battery, but since the battery tender requires a lower amp rated fuse I created an adapter cable which has an in-line fuse of 7 amps that fits between the main lead and the battery tender. Everything uses SAE ends so it is simple plug and play. Now I have one battery lead that can be used for two different functions.
