Place the cover down so that it hangs over the rear of the server by about 13 mm (0.5 inches)  and the side latches align with the slots in the sides of the chassis.
Note - There are three latching tabs on the sides of the cover, two on the right side and one on the left side (viewing the server from the front), There is also a latch on the underside of the cover in the front left corner near the green release button.
If the cover corners are not flush with the chassis, slide the cover towards the rear of the chassis until you can position the cover correctly.
Note - If the top cover is not correctly positioned before attempting to slide the cover forward, the internal latch that is located on the underside of the cover might be damaged.
As you slide the cover toward the front of the server, watch the green release button. You will hear an audible click when the green release button pops up, indicating that the cover is locked.
Figure 71 Installing the Top Cover