FORD 1999 Windstar - Manual (Page 119)

Combination lap and shoulder belts
1. Insert the belt tongue into the
proper buckle (the buckle closest to
the direction the tongue is coming
from) until you hear a snap and feel
it latch. Make sure the tongue is
securely fastened in the buckle.
2. To unfasten, push the release
button and remove the tongue from
the buckle.
The front and rear outboard safety restraints in the vehicle are
combination lap and shoulder belts. The front and rear seat passenger
outboard safety belts have locking cinch tongues described below:
Safety belts with locking cinch tongue
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.
Seating and safety restraints
119