Lenovo ThinkSystem SR950 Setup Manual page 353

Figure 105. Securing the M.2 drives
Attention: Make sure the two nubs on the retainer are in the small holes on the M.2 backplane
when the retainer is slid forward.
Slide the retainer forward (toward the connector) until you hear a soft "click" sound.
After installing an M.2 drive:
1. Install the M.2 backplane. See "Install the M.2 backplane" on page 344.
2. Install the riser that you removed to access the M.2 backplane. See "Install the riser for slot 10 to 15
(riser 2)" on page 365 or "Install the riser for slot 16 to 17 (riser 3)" on page 368.
3. Install the I/O tray and connect all cables. See "Install the I/O tray" on page 335.
Appendix B. Component reference
349