Ford 1998 Windstar Owner's Manual page 198

Installing a Child Safety Seat at the Center Seating
Position with Locking Adjustable Lap Belt
Lengthen the lap belt. To lengthen the belt, hold the tongue
1.
so that its bottom is perpendicular to the direction of
webbing while sliding the tongue up the webbing.
Place the child safety seat in the center seating position.
2.
Route the tongue and webbing through the child seat
3.
according to the child seat manufacturer's instructions.
Insert the belt tongue into the proper buckle for the center
4.
seating position until you hear a snap and feel it latch. Make
sure the tongue is securely fastened to the buckle by pulling
on tongue.
Push down on the child seat while pulling on the loose end
5.
of the lap belt webbing to tighten the belt.
Before placing the child into the child seat, forcibly tilt the
6.
child seat from side to side and in forward directions to
ensure that the seat is held securely in place. If the child seat
moves excessively, repeat steps 5 through 6 or properly
install the child seat in a different seating position.
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