Lenovo System x3550 M4 Installation And Service Manual page 224

Step 4. Remove the air baffle (see "Removing the air baffle" on page 191).
Step 5. Press and hold the connector release tab; then, remove the DVD drive cable from the connector
on the system board.
Attention: You must press the connector release tab in order to disconnect the DVD drive cable
from the system board. Do not disconnect the DVD drive cable by using excessive force.
Figure 132. DVD drive cable routing
Step 6. From the rear of the DVD drive cage, press and hold the connector latch (on the left of the cable
connector) and grasp the cable connector and slide it to the right; then, remove the DVD drive
cable from the connector on the back of the DVD drive and set it aside.
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System x3550 M4 Installation and Service Guide