Lenovo NeXtScale nx360 M4 Installation And Service Manual page 150

To remove the optional 3.5-inch hard disk drive hardware RAID cage, complete the following steps.
Screws
Figure 58. Removing a 3.5-inch hard disk drive hardware RAID cage
Step 1. Remove the cover (see "Removing the compute node cover" on page 105).
Step 2. Disconnect the power cable and the mini-SAS cable from the system-board and the storage tray
respectively (see "Cabling hard disk drive with ServeRAID SAS/SATA controller" on page 176).
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IBM NeXtScale nx360 M4 Installation and Service Guide
3.5-inch Hard disk
drive cage