Ford 1998 Windstar Owner's Manual page 204

SECOND ROW BUCKET (if equipped) SEATING POSITION
— You must use the tether strap anchor location provided
on the back of the seat cushion. (Refer to Figure 4.)
Figure 4: Tether anchor location — second row bucket seat
Only use the tether attachment hole locations shown in
the illustrations. The tether anchor may not perform
properly if the wrong mounting location is used.
Once you have attached the safety seat, test the seat before you
place the child in it. Tilt the seat from side to side. Also try to
tug the seat forward. Check to see if the belt holds the seat in
place.
If the safety seat is not anchored properly, the risk of a
child being injured in a collision or sudden stop greatly
increases.
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