Ford 2002 Thunderbird Owner's Manual page 163

Roadside Emergencies
3. Connect the negative (-) cable to the negative (-) terminal of the
assisting battery.
4. Make the final connection of the negative (-) cable to the spare tire
tie-down stud. (Your vehicle may be equipped with a plastic cap on top
of the tire tie-down stud. This cap must be removed prior to attaching
the cable to the stud.)
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