Proper Order To Disconnect Car Battery. Technically you can connectdisconnect the terminals in w. Detach the negative black battery cable from the battery.

Always connect battery cables exactly in this order. When you disconnect your car battery from the car it helps prevent the electrical systems including the clock and on-board computer system from draining it. Pull the negative cable away from the car battery.
A better tool to use would be battery pliers or a battery wrench.
Once its loosened twist and pull up on the cable. Detach the negative black battery cable from the battery. In case you cannot reach the nut of the terminal attach a wrench extender. The terminals will be marked positive and negative.

