The cage on the back of the case is designed to allow the user the ability to manage their cables by securing them to points along the cage. It's shape borders the edges of your case and components. This makes tying wires, cables and hoses an easy clutter-free task. It is also creates the same smooth curve seen in the front panel, thus serving as a great example of form and function. The left cover is removable and exposes the bottom side of the motherboard tray. Aside from the push-points in the front, removing the cover serves little purpose.