The safest order to attach the jumper cables is as follows:

Attach one black jumper cable clamp to the negative terminal of the working live battery.
Attach the other end of that cable, the second black jumper cable clamp, to an unpainted piece of stationary metal or ground of the vehicle with dead battery . Do not attach this clamp to the negative terminal on the dead battery.

Attach one red jumper cable clamp to the positive terminal on the dead battery.
Attach the other end of the same cable, the second red jumper cable clamp, to the positive terminal on the working live battery.

Remove in reverse order.

Thanks! Stay Safe! Ride Safe!

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