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Step 2: Align the hardy holes on the expander backplane with the rivets in the
chassis, install the expander card into the chassis, and use screws to fix.
5.2.10 Internal HDD Backplane Replacement
Step 1: Align the connecting fingers of the internal HDD backplane with the slots
of the expander backplane, and align the three metal parts of the internal HDD
backplane with the three slots on the chassis.
Step 2: Vertically install the backplane into the chassis, use two screws to fix.
Step 3: Repeat step 1 and step 2 to install the other two internal HDD backplane.
5.2.11 Front HDD Backplane Replacement
Step 1: Align the hardy holes on the front HDD backplane with the rivets in the
chassis, and place the backplane in the chassis as shown in the following figure.