Dell Precision 3510 Owner's Manual page 23

c. Disconnect the keyboard cables [4, 5].
4. To remove the eDP cable:
a. Unroute the WWAN and WLAN cables from the doc frame [1].
b. Remove the screw and lift the metal bracket [2, 3].
c. Disconnect the eDP cable [4].
5. To remove the dock frame:
a. Remove the screws that secure the dock frame to the computer [1].
b. Lift the dock frame from the computer [2].
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