Lenovo THINKSTATION D10 - Manual (Page 42)

5. Position the replacement memory module over the memory connector. Make
sure the notch 1 on the memory module aligns correctly with the connector
key 2 on the system board. Push the memory module straight down into the
connector until the retaining clips close. See Figure 26.
6. Install the air duct.
7. Go to Chapter 4, “Completing the parts replacement,” on page 39.
Figure 25. Removing a memory module
Figure 26. Installing a memory module
34 ThinkStation Hardware Installation and Replacement Guide