Which Battery Terminal Do You Attach First. Whole car except a few parts like the positive pole are connected. When installing a new battery its best to start with the positive terminal and then work your way around the car battery to install the negative one after.
Once you connect the positive terminal and the spanner touches the frame or any grounded part of it a short circuit may occur that could cause the battery to explode. Attach the negative or black clamp to the negative terminal on the supply battery. So connecting the lead first is safer.
Connect the new battery in the reverse order positive then negative.
Start the Supply Engine. Positive first then negative. And you can accidentally hit that body with the positive lead. The man said it Always connect the positive cable first to the battery.
