Ford Mustang 2001 Owner's Manual page 144

Roadside emergencies
2. Connect the other end of the positive (+) cable to
the positive (+) terminal of the assisting battery.
3. Connect the negative (-) cable to the negative (-)
terminal of the assisting battery.
4. Make the final connection of the negative (-)
cable to an exposed metal part of the stalled
vehicle's engine, away from the battery and the
carburetor/fuel injection system. Do not use fuel
lines, engine rocker covers or the intake manifold as
grounding points.
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