Chevrolet Optra 2004 Owner's Manual page 47

Top Strap Anchor Location
Top strap anchors are already installed in your vehicle
for the rear seating positions.
Do not use a child restraint with a top strap in the right
front passenger's position because there is no place
to anchor the top strap.
Sedan shown, Hatchback similar
You will find the anchors on your sedan behind the rear
seat on the filler panel.
You will find the anchors on your hatchback in the rear
cargo area.
Pull the front part of the
plastic cover upward to
access the top strap
anchors.
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