Lenovo System x3550 M5 Installation And Service Manual page 172

The following illustration shows cable routing for the DVD cable:
Attention: Follow the DVD drive cable routing as the illustration shows. Make sure that the cable is
not pinched and does not cover any connectors or obstruct any components on the system board.
DVD drive cable
Cable connector latch
Figure 83. DVD drive cable routing for 2.5-inch hard disk drive server models
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Lenovo System x3550 M5 Installation and Service Guide