Which Battery Terminal To Connect First. Positive first then negative. Then I connect the negative ground to the engine block bumper or some part of the frame far away from the battery.

Remove old batter - install new battery. When you have finished working on your vehicles batteries andor electrics connect the POSITIVE cableterminal on each battery first. Whole car except a few parts like the positive pole are connected.
Positive first then negative.
Connect the new battery in the reverse order positive then negative. Positive first then negative. That way any spark is far away from the battery. When jumping a car what color goes first.

