Chevrolet 2009 Aveo Owner's Manual page 62

3. Pick up the latch plate, and run the lap and shoulder
portions of the vehicle's safety belt through or
around the restraint. The child restraint instructions
will show you how.
Tilt the latch plate to adjust the belt if needed.
1-58
4. Push the latch plate into the buckle until it clicks.
Position the release button on the buckle so that
the safety belt could be quickly unbuckled if
necessary.