Cadillac 1993 Fleetwood Owners Literature page 74

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CAUTION:
Never do this.
Here a child is sitting in a seat that has a lap-shoulder belt, but
the shoulder part is behind the child. If the child wears the belt
in this way, in a crash the child might slide under the belt. The
belt's force would then be applied right on the child's abdomen
That could cause serious or fatal injuries.
Wherever the child sits, the lap portion of the belt should be worn low
and snug on the hips, just touching the child's thighs. This applies belt
force to the child's pelvic bones in a crash.
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