Ford F-150 2010 Owner's Manual page 171

Combination lap and shoulder belts
1. Insert the belt tongue into the
proper buckle (the buckle closest to
the direction the tongue is coming
from) until you hear a snap and feel
it latch. Make sure the tongue is
securely fastened in the buckle.
2. To unfasten, push the release
button and remove the tongue from
the buckle.
Center front safety belt (Regular Cab center and CrewCab rear
center seating positions only)
WARNING: Always use both lap and shoulder safety belt in the
Regular Cab center seating position.
If you carry large cargo behind the seat or items that might damage or
soil the belt, detach the belt from the seat:
• Release the mini-buckle by
inserting a key or similar object
into the slot.
Seating and Safety Restraints
171