Ford 2006 Focus Owner's Manual page 158

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.
158
2006 Focus (foc)
Owners Guide (post-2002-fmt)
USA (fus)