Hitachi AMS 2100 Hardware Manual page 160

Figure 5-38: ENC Cable Routing on High-density Expansion Unit
NOTE: The cable routing bars are used to protect the cables from being
bent too sharply and becoming caught or tangled when the high-density
expansion unit is moved in the rack as needed to replace disk drives and or
ENC units.
5. Open the lock lever on the ENC cable holder and slide the cable holder
into the appropriate slot on the high-density expansion unit. See
Figure
5–42
5-39.
Installation
Hitachi AMS 2100/2300 Storage System Hardware Guide