Yeah, just give it a mighty tug and it should pop off. The rest is pretty easy to do
1. Remove trunk carpet
2. Remove big black thing that protects the battery/spare tire area
3. Unscrew net holder things
4. Pull up on the rear plastic trunk lining
5. Remove plastic screw thing that holds the carpet along the bottom of the trunk
6. Pull on the top plastic tab thing to loosen up the carpeting.
7. Have fun with amp