Removing sides on the C1500

Does anyone have a link to a document showing the proper way to remove the plastic sides on the C1500?
After removing the back screws that hold the upper sides, the side is still held in place somehow. Does it have a clip or something?

Never mind. I figured it out. Didn’t notice the screws on the front.

Weirdly, the screws are a bit of a dog’s breakfast - some long, some short, some T9, some T10, and not consistently on each side! Did anyone else notice that?

Also, does the Rackmount kit cover all the holes on the sides?