Ford 2003 Mustang Owner's Manual page 97

Seating and safety restraints
Carefully follow all of the manufacturer's
instructions included with the safety seat
you put in your vehicle. If you do not install and
use the safety seat properly, the child may be
injured in a sudden stop or collision.
Installing child safety seats in combination lap
and shoulder belt seating positions
1. Position the child
safety seat in a seat
with a combination lap
and shoulder belt.
An air bag can kill or injure a child in a child
seat. If you must use a forward-facing child
seat in the front seat, move seat all the way back.
Children 12 and under should be properly
restrained in the rear seat whenever
possible.
2. Pull down on the
shoulder belt and then
grasp the shoulder belt
and lap belt together.
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