Ford 1996 Thunderbird Manual page 15

Safety Belts with Locking Cinch Tongue
for Rear Outboard Seating Positions
Your vehicle is equipped with safety seat belts
containing a cinch tongue at the rear outboard
seating positions.
The locking cinch tongue will slide up and
down the belt webbing when the belt is in the
stowed position or while putting seat belts on.
When the locking cinch tongue of the
lap/shoulder combination seat belt is latched
into the buckle, the cinch tongue will allow the
lap portion to become shorter, but locks the
webbing in place to restrict it from becoming
longer.
Before you can reach and latch a combination
lap and shoulder belt having a cinch tongue into
the buckle, you may have to lengthen the lap
belt portion of it. To lengthen the lap belt, pull
some webbing out of the shoulder belt retractor.
While holding the webbing below the tongue,
grasp the tip (metal portion) of the tongue so
that it is parallel to the webbing and slide the
tongue upward. Provide enough lap belt length
so that the tongue can reach the buckle.
NOTE: If you grasp the tongue by the tongue
cover to lengthen the belt, the tongue
cover will grab the webbing, making it
difficult to slide.
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