Lenovo ThinkCentre M58 9960 Hardware Manual page 140

4. Remove the memory module being replaced by opening the retaining clips as
Figure 45. Removing the memory module
5. Position the replacement memory module over the memory slot. Make sure the
Figure 46. Installing the memory module
6. Go to "Completing the FRU replacement" on page 158.
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Hardware Maintenance Manual
shown.
notch 1 on the memory module aligns correctly with the slot key 2 on the
system board. Push the memory module straight down into the slot until the
retaining clips close.