Step 2.  Install the memory module into the slot. 
Figure 198. Memory module installation
a.  Gently open the retaining clip on each end of the memory module slot.
b.  Align the memory module with the slot, and gently place the memory module on the slot with 
both hands.
c.  Firmly press both ends of the memory module straight down into the slot until the retaining 
clips snap into the locked position. 
Note: If there is a gap between the memory module and the retaining clips, the memory 
module has not been correctly inserted. In this case, open the retaining clips, remove the 
memory module, and then reinsert it.
After you finish
Complete the parts replacement. See “Complete the parts replacement” on page 381.
Middle drive backplane and drive cage replacement
Use this information to remove and install the middle 2.5-inch or 3.5-inch drive backplane and drive cage.
Depending on the server configurations, some server models support one of the following middle drive 
cages. For detailed information, see “Technical rules” on page 189.
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ThinkSystem SR650 V2Maintenance Manual