Lenovo ThinkStation P300 Hardware Maintenance Manual page 200

Figure 187. Installing the power supply assembly
11. Connect the new power supply assembly cables to all drives and the system board. See "Locating
parts on the system board" on page 79.
12. Press the release tab
Figure 188. Pivoting the drive bay assembly downward
13. Position the heat sink fan duct on the top of the heat sink as shown. Then, press the heat sink fan
duct straight down until it snaps into position.
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ThinkStation P300 Hardware Maintenance Manual
1 as shown and pivot the drive bay assembly downward.