Yes those posts are the anchors for the tonneau cover.They need to be installed.Once installed then the bungee type loops hook over the installed posts thereby securing the cover to the car.
Camaro Convertible Tonneau Installation
An optional one-piece, soft tonneau cover (Fig. 9) is available on the Camaro convertible that fits over the lowered folding top, providing a finished appearance. For the 2012 model year, the design of the tonneau cover has changed. It now includes two elastic cords to help secure the edges of the cover.
Fig. 9
Correct installation of the tonneau cover is critical to securing the cover. It's important to explain the installation procedure to owners.
TIP: During PDI, be sure to remove the two Christmas tree fasteners on the trim panel behind the rear seatback and install the two posts included with the tonneau cover. The front of the cover attaches to the posts. In the near future, the posts will be installed at the factory during vehicle assembly.
Tonneau Cover Installation
1. Unfold the cover and place it on the vehicle behind the rear seat.
2. Fold over the sides of the cover.
3. Attach the cord (Fig. 10, A) at the front edge of the cover to the post (Fig. 10, B) on the back seat rear panel on both sides.
The cover must be secured to each post. Previous models had two clips that attached to the posts.
Fig. 10
4. Insert the outer tab (Fig. 11, A) under the trim (Fig. 11, B) on both sides.
Fig. 11
5. Push the outer rim and center edge of the cover under the vehicle trim.
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