Lenovo ThinkEdge SE455 V3 User Manual page 161

Figure 130. Installing a PCIe adapter to PCIe riser 1
Figure 131. Installing a PCIe adapter to PCIe riser 2
Step 3. Fasten one screw to secure the adapter; then, close the retainer.
Figure 132. Installing the retaining screws
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Chapter 5 Hardware replacement procedures 153