Lenovo ThinkCentre 6068 Hardware Installation And Replacement Manual page 22

6. Position the memory module over the memory connector. Make sure that the
Figure 10. Positioning the memory module
14
Hardware Installation and Replacement Guide
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.
What to do next:
v To work with another option, go to the appropriate section.
v To complete the installation, go to Chapter 4, "Completing the parts
replacement," on page 35.