Ford 2010 Explorer Owner's Manual page 329

Roadside Emergencies
Connecting the jumper cables
1. Connect the positive (+) jumper cable to the positive (+) terminal of
the discharged battery.
Note: In the illustrations, lightning bolts are used to designate the
assisting (boosting) battery.
2. Connect the other end of the positive (+) cable to the positive (+)
terminal of the assisting battery.
329
2010 Explorer (exp)
Owners Guide, 2nd Printing
USA (fus)