Drive Cage

I bought an hp prebuilt a few months ago, and would like to upgrade. There is only one problem, there is a cage in the way and stopping me from unplugging any of the wires. Has any one any idea if this is removable or not without cutting anything? Image...

Hi, I am running windows 7 with 3 Hard Drives. One for windows and the other 2 for storage. One of these stopped working and when I connect the one which is working fine with the wires of the other, in Bios I see the one with the problem which is not connected. So the damaged HD is Segate and...