Ford Mercury Villager 1997 Owner's Manual page 142

Position the shoulder belt height adjuster so that the belt
rests across the middle of your shoulder. Be sure the
shoulder belt is properly positioned on your shoulder each
time you use the belt. If the shoulder belt is off your
shoulder, on your upper arm or neck, there is a greater risk
of severe injury in a collision.
Lap Belt Without a Retractor (for the three-passenger
bench seat)
The center seat of the three-passenger bench seat has a lap belt
without a retractor. To make the belt longer, tip the tongue at a right
angle to the belt and pull the belt over your lap until the
tongue reaches the buckle.
To fasten the belt, pull the belt across your hips and insert the
tongue into the correct buckle on your seat until you hear a snap
and feel it lock. Make sure the buckle is securely fastened.
Pull the loose end of the webbing and adjust the belt so that it
fits snugly and as low as possible around the hips:
If you need to lengthen the belt, unfasten it and repeat the
procedure above.
If you need to shorten the belt, pull on the loose end of the
webbing.
To store the belt:
Fasten the center tongue and buckle when not in use. This will
prevent the belt from falling between the seat and the seatback.
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