Ford F series Owner's Manual page 124

Installing Child Safety Seats
Your vehicle is equipped with a dual locking
mode retractor on the shoulder belt portion of
the combination lap/shoulder safety belt for the
front seat passenger and a dual-locking mode
retractor for rear outboard passengers.
If you choose to install a forward-facing child
safety seat or infant carrier in the front seating
positions, move vehicle seat as far back as
possible.
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