FORD 2003 Expedition v.1 - Manual (Page 159)

Always transport children 12 years old and under in the back
seat and always properly use appropriate child restraints.
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.
• Front seats
• Rear seats
2. To unfasten, push the release
button and remove the tongue from
the buckle.
Seating and Safety Restraints
159