Lenovo ThinkEdge SE455 V3 User Manual page 72

Figure 37. Removing the M.2 air baffle for configuration with internal drive cage
Figure 38. Removing the M.2 air baffle for configuration without internal drive cage
Step 3. If necessary, separate the front half and rear half of the M.2 air baffle.
64 ThinkEdge SE455 V3 User Guide