Lincoln 1997 Town Car Owner's Manual page 156

NOTE: The belt webbing below the tongue is the
lap belt portion of the combination lap/shoulder
belt, and the belt webbing above the tongue is the
shoulder belt portion of the combination
lap/shoulder belt.
2. With your other hand, grasp the tip (metal
portion) of the tongue (not the cover) and slide
the tongue up the webbing as far as it will go.
See Figure 1. Release the tongue, but do not
let go of the lap portion of the belt webbing.
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3. While still holding the belt webbing below the
tongue in one hand, use your other hand to
grasp the tip (metal portion) of the tongue and
belt webbing together, and again pull out as
much of the belt as possible. Then, let go of
the lap portion of the belt webbing.
4. While holding the shoulder and lap belt
portions together, route the tongue and
webbing through the child seat according to the
child seat manufacturer's instructions. See
Figure 2. Be sure that the belt webbing is not
twisted.