IBM System x3550 M4 Installation And Service Manual page 244

Figure 125. DVD drive removal
5. Slide the drive retention clip from the side of the drive. Save the clip to use
Figure 126. DVD drive retention clip removal
6. Attach the drive retention clip to the side of the DVD drive filler panel that you
7. Slide the DVD drive filler panel into the DVD drive bay until the DVD drive
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IBM System x3550 M4 Type 7914: Installation and Service Guide
when you install the replacement drive or replace the DVD drive filler panel.
removed in step 4 on page 228.
filler panel clicks into place.