Chevrolet 1995 Cavalier Owner's Manual page 37

3. To make the lap part tight, pull down on the buckle
end of the belt as you pull up on the shoulder part.
The lap part of the belt should be worn low and snug on
the hips, just touching the thighs-. In a crash, this applies
force to the strong pelvic bones. And you'd be less
likely to slide under the lap belt. If you slid under it, the
belt would apply force
at
your abdomen. This could
cause serious or even fatal injuries. The shoulder belt
should go over the shoulder and across the chest. These
parts of the body are best able to take belt restraining
forces.