Dell Precision Workstation 450 User Manual page 190

Ensure that all cables are connected, and fold cables out of the way.
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Ensure that no tools or extra parts are left inside the computer.
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Close the computer cover:
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b
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d
D e l l P r e c i s i o n 6 5 0
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176 Cl osi ng the C om puter C ov er
Pivot the cover down and into position.
If your computer has a baffle, ensure that the baffle is correctly positioned by
guiding it into place as you lower the cover.
Press down on the cover to close it.
Once the cover is closed, slide the release latch to the right until the latch clicks
into place.
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