Ford 2001 Ranger Owner's Manual page 116

Seating and safety restraints
Rear facing child seats should NEVER be placed in the front
seats unless the passenger airbag switch is turned off.
2. Pull down on the shoulder belt
and then grasp the shoulder belt
and lap belt together.
3. While holding the shoulder and
lap belt portions together, route the
tongue through the child seat
according to the child seat
manufacturer's instructions. Be sure
the belt webbing is not twisted.
4. Insert the belt tongue into the
proper buckle (the buckle closest to
the direction the tongue is coming
from) for that seating position until
you hear and feel the latch engage.
Make sure the tongue is latched
securely by pulling on it.
116