Ford Mercury Villager 1997 Owner's Manual page 167

Seating and Safety Restraints
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.
Follow these precautions to decrease the chance of injury
in an accident.
If the anchor bolt(s) is ever removed, the hole(s) in the
floor must be sealed to prevent the possibility of exhaust
fumes entering the passenger compartment.
WARNING
WARNING
WARNING
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