Lenovo ThinkStation P520 User Manual page 120

d. Hold the new M.2 solid-state drive by its edges and ensure that the circuit board side is facing
upward. Align the notch in the new M.2 solid-state drive with the slot key in the M.2 slot. Insert the
drive into the corresponding slot on the PCIe adapter until it is firmly seated. Then, insert the plug of
the retention latch into the hole to secure the new drive.
Note: Do not touch the circuit board of the M.2 solid-state drive.
Figure 90. Installing the M.2 solid-state drive
6. Install the heat sink as shown. Then tighten the screws to secure the heat sink.
Figure 91. Installing the heat sink onto the PCIe adapter
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P520 User Guide