Chevrolet 2004 Corvette Owner's Manual page 104

3. There are two spring-loaded storage pins on the
rear wall of the storage compartment (A). These
storage pins go into the slots on each side of
the roof panel (B).
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4. Gently lower the roof panel onto the carpeted
ledge. Then, pull each release rearward and upward
to place the storage pins into the holes of the
roof panel.
5. Gently lift and lower the roof panel to be sure it is
locked into place.