Asus RS160-E4/PA4 - Manual (Page 44)

Chapter 2: Hardware setup 2-28
6. Disconnect the LAN activity LED/
Locator LED cable and USB cable
from the connectors under the top
front cover.
7. Disconnect the IDE cable and the
power plug from the connectors on
the back of the drive.
8. Then leave the cover as side.
5. Then push the front cover as arrow
show.