Is that what case looks like? Only ask as cyberpower use a bunch of different cases.
judging from your photo and what my PC looks like, the black outline probably goes on outside of case - its there to conceal the spot where glass meets frame of window, and hide the area side panel meets the top of case
Most side panels only go on one way anyway. what rest of cover looks like probably offers a clue. Insides generally have bent edges and screw holes to allow you to attach front to case
for example