cab...I did the same install on the sub and found that the wall is very thin. The screws rattle loose and I get a lot of rattle from the sub and areas around it. Did you have the same experience.
Also, on the location of the second amp. That also looks like a thin wall on the 06 LSV. I am scared to screw into it, but it doesn't look like you had a problem. What's the secret?