Dell Precision 7960 Service Manual page 42

Steps
1. Press down on the latch and disconnect the cable from its connector on the front PERC module.
2. Loosen the two thumb screws to release the front PERC from the computer chassis.
3. Lift the front PERC module at an angle.
4. Remove the front PERC module out of the computer.
42 Removing and installing components