Compaq Armada 4100 Reference Manual page 89

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8. Turn the computer and MCD over, bottom side up.
9. Tighten the two thumbscrews on the bottom of the MCD by turning
them clockwise to securely attach the MCD to the computer.
10. Turn the computer back over, right side up. Attach external devices.
Open the display.
11. Turn on the computer.
Tightening the Thumbscrews on the Bottom of the MCD
7-6 Maximizing Your Portable Expansion Unit