Lenovo ThinkStation P5 Manual page 27

Installing 3.5" SATA Drives in the Internal Bays
All ThinkStation P5 models include two internal SATA drive bays standard.
These bays are located in the bottom of the system between the PSU and
the front of the chassis. The side cover of the system must be removed to
access the internal drive bays. See
When adding SATA drives to a system with a 1000W PSU, where no SATA
drives were previously installed, it will be necessary to install a Front HDD
Bay Fan Kit. A system that shipped with a 750W PSU will have this fan kit
by default. The fan kit consists of a fan in a fan holder.
1. Pinch the arrowed tabs and pull the drive tray out of the system.
2. Insert the drive, bottom down into the tray with the signal and power
connections on the same end as the arrowed tabs. Angle the side of the
drive down into the tray and line up the holes on the side of the drive with
the posts on the inside of the tray then insert the posts.
Figure 1 in Section 1 for reference.
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