Acer Altos G530 - Manual (Page 52)

3 System upgrade 42
(1) Slide the cage into the chassis with the backplane board
facing the rear of the chassis. The cage is locked to the chassis
with an audible click.
(2) Locate and attach the following cables clamped on the side of
the chassis to their corresponding connectors on the
backplane board:
Important: If a four-bay hot-plug SCSI HDD cage is already
installed in the top HDD bay, you must block the W83792D_ID1
jumper. Set pins 2 and 3 to short.
(1) SCSI data cable