Mercury 1997 Cougar Manual page 116

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.
Adjusting the cinch tongue rear combination lap and
shoulder belt
114