Which post do you connect first when installing a battier

I attache the 'hot' or the '+' or the 'Positive' (usually red) wire/ post first. The reason is if you should happen to touch the car with your wrench while attaching ... there is no circuit because the neutral ... which will eventually be connected to the frame and body, is not connected. If you did the neutral first and accidentally touched the body, there would be sparking arcing and noise.

The ground cable always connects first, makes it so you car is grounded to the ground instead of your electrical components, which will prevent them from burning out if a power surge occurs