IBM 8302 Hardware Maintenance Manual page 66

When you install an internal drive, it is important to note what type and size of
drive that you can install in each bay. Also, it is important to correctly connect the
internal drive cables to the installed drive.
Drive specifications: Your computer comes with the following IBM-installed
drives:
v A CD drive or DVD drive in bay 1 (some models)
v A 3.5-inch diskette disk drive in bay 4
v A 3.5-inch hard drive in bay 5
Any bay that does not have a drive installed has a static shield and bay panel
installed.
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Hardware Maintenance Manual