Does anyone have the instruction list for the tail lamp guards

[pool_shark]

When I installed my tail light guards, I had to loosen the screws behind the tabs on the rear bumper to install the bracket that goes beneath the guards. Installing the one on the driver side required closing the rear door half way in order to get the tail light guard installed without scratching the paint.

I assume some are different than others so it could very well require the instructions, I didn't know there were screws behind the tabs on the rear bumper, why would I?