The shroud is a 3 sided metal stamping that attaches to the base that the power supply sits on. It is attached by 4 screws, 2 on each side of the power supply base. When installed, it actually wraps around the power supply.
I am actually disappointed in this case. Running the cabling is a pain and looks sloppy when you are done. I don't get the wire clips/fan holder for the upper hard drive container. If you put the fan on, then the container can't be used for anything else. True??
The lower hard drive container is okay in itself, but the way it is mounted bites. Having to run the power cables up through one hole and back down to the hard drives is sloppy. If you install multiple hard drive in it, and remove the fan, then the only cooling is the power supply.
If this container had been installed a half inch closer to the power supply, then the fan could have been mounted in the very front of the case blowing across the hard drives.
sigh...I have 12 more of these cases coming in the next few weeks.
Bozo