FORD 2003 Explorer v.2 - Manual (Page 131)

Attaching child safety seats with tether straps
Most new forward-facing child safety seats include a tether strap which
goes over the back of the seat and hooks to an anchoring point. Tether
straps are available as an accessory for many older safety seats. Contact
the manufacturer of your child seat for information about ordering a
tether strap.
The rear seats of your vehicle are equipped with built-in tether strap
anchors located behind the seats as shown below.
The tether strap anchors in your vehicle are in the following positions
(shown from top view):
• 5 passenger vehicle
• 7 passenger vehicle
Attach the tether strap only to the appropriate tether anchor as
shown. The tether strap may not work properly if attached
somewhere other than the correct tether anchor.
1. Position the child safety seat on the rear seat cushion.
2. Route the tether strap under the head restraint and between the head
restraint posts.
Seating and Safety Restraints
131