Dell PowerEdge C5230 Hardware Owner's Manual page 118

3 Disconnect the hard drive board from the system board  and lift out of
the sled.
Figure 3-25. Disconnecting the 3.5" Hard Drive Board
Installing a 3.5-inch Hard Drive Board
1 Unpack the new hard drive board.
2 Holding the board by the edges, place the hard drive board into the sled
and connect to the system board .
3 Replace the eight screws to secure it in place .
Figure 3-26. Installing a 3.5" Hard Drive Board
118
Installing System Components