Graco NAUTILUS PD101777B Owner's Manual page 37

3. Fasten harness clip . Position harness
clip at middle of child's chest, level with
armpits.
4. Tighten the harness straps by pulling the
adjustment strap on the front of the seat .
5. Make sure straps are flat and snug
against child's shoulders and thighs.
You should not be able to pinch the
harness straps. A snug strap should not
allow any slack. It lies in a relatively straight
line without sagging. It does not press on
the child's flesh or push the child's body into
an unnatural position .
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