Ford 1998 F-150 Owner's Manual page 75

If you have a SuperCab, attach the
bracket to the inside of the back
panel of your vehicle. Carefully
follow the instructions provided
with the kit.
If you have a SuperCab Ford
recommends you attach tether
safety seats in the rear seating
position (if possible) with the
tether strap attached to the tether
anchorage bracket as shown in the
instructions provided with the
tether anchor kit.
Tighten the anchor
according to specifications.
Otherwise, the safety seat may
not be properly secured and the
child may be injured in a sudden
stop or collision.
Seating and safety restraints
75