Ford Vehicle Owner's Manual page 50

If a tethered seat is installed in the front seat,
Ford recommends placement of the tethered
safety seat in the center front seating position,
with the tether strap secured to the center rear
lap belt tongue or to the webbing of the buckled
center rear lap belt behind the child safety seat.
The rear lap/shoulder safety belts should not be
used to secure the tether strap of a safety seat
located in the front seat.
Failure to follow these precautions could
increase the chance of injury in an
accident.
In SuperCabs equipped with center facing jump
seats, the tether strap anchor bracket should be
installed only at the center of the cab's back
panel with the child seat in the front center
seating position. Installing an anchor bracket at
the right rear of the cab may increase risk of
injury to an occupant of the right rear center
facing jump seat in the event of a collision or
sudden stop. If a tethered child seat is installed
in the right front seating position, secure the
tether strap to the webbing of the buckled right
rear lap belt.
Do not install a child seat in a center
facing jump seat.
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