Dell Precision M20 - Manual (Page 30)

8. Starting at the back center of the palm rest, use your fingers to separate the palm rest from the computer base by lifting the inside of the palm rest
while pushing in on the outside.
Installing the Palm Rest
1. Align the palm rest with the computer base and snap into place.
2. Connect the touch pad cable to the connector on the system board.
3. Replace the three M2.5 x 5-mm screws on the top of the palm rest.
4. Turn the computer over and replace the thirteen M2.5 x 8-mm screws.
5. Replace the display assembly .
6. Replace the keyboard .
7. Replace the center control cover .
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1 M2.5 x 8-mm screws (13)
NOTICE: Carefully separate the palm rest from the computer base to avoid damage to the palm rest.