Chrysler PT Cruiser Owner's Manual page 41

THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 39
2
Inserting Latch Plate Into Buckle Removing Slack From Belt
4. Position the lap belt across your thighs, below your
abdomen. To remove slack in the lap belt portion, pull up
on the shoulder belt. To loosen the lap belt if it is too tight,
tilt the latch plate and pull on the lap belt. A snug belt
reduces the risk of sliding under the belt in a collision.