Dell Precision 7820 Tower Owner's Manual page 61

• SATA 0,1 cable [1]
• SATA 2, 3, 4, 5 cable [2]
• ODD 0, 1 cable [3]
• USB 3.1 cable [4]
NOTE: Do not pull the connector by the cable wires. Instead, disconnect the cable by pulling the connector end.
Pulling the cable wires may loosen them from the connector.
b. Unroute the fan cable [1] from the system board.
c. Remove the screw [2] that secure the rear system fan to the chassis.
d. Lift the fan to release it from the retention slot in the system chassis [3].
Removing and installing components 61