Does your car have the holes in the sides and the clips on the deckled to install this?
There is no hardware required if you have the holes and clips, but since you have an '09, it's a good be that you don't have them. Touring and Nismo are the only ones that came with the proper stuff in '09. The base didn't.
If not, here's a write-up that I did.
DIY: Steps to add rear tonneau mounts for those without