Brother HL-2400Ce - Manual (Page 194)

CHAPTER 5 MAINTENANCE
5-47
5. Fit the 4 HDD pillars into the 4 holes of the main controller board,
and secure the pillars with the screws provided from the rear of the
PCB.
Fig. 5-59 Set the HDD
6. Connect the flat cable to the main controller board.
Fig. 5-60 Insert the flat cable