Note: The M.2 backplane you want to adjust might be different from the following illustrations, but the 
adjustment method is the same.
Figure 52. M.2 retainer adjustment
Step 1. 
Press both sides of the retainers.
Step 2. 
Move the retainer forward until it is in the large opening of the keyhole.
Step 3. 
Take the retainer out of the keyhole.
Step 4. 
Insert the retainer into the correct keyhole into which the retainer should be installed to 
accommodate the particular size of the M.2 drive you wish to install.
Step 5. 
Press both sides of the retainer.
Step 6. 
Slide the retainer backwards until it is seated in place.
Install the M.2 backplane and M.2 drive
Use this information to install the M.2 backplane and M.2 drive.
About this task
Attention: 
•  Read 
“Installation Guidelines” on page 35 and “Safety inspection checklist” on page 36 to ensure that you 
work safely.
•  Power off the server and peripheral devices and disconnect the power cords and all external cables. See 
“Power off the server” on page 44. 
•  Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static- 
sensitive components in their static-protective packages until installation, and handling these devices with 
an electrostatic-discharge wrist strap or other grounding system.
Watch the procedure 
A video of this procedure is available at YouTube: 
https://www.youtube.com/playlist?list=PLYV5R7hVcs- 
CTkyVDu-5Lhy1r9G-4PQGl
.
Procedure
86 ThinkSystem SR645 V3 User Guide