Compaq StorageWorks Reference Manual page 23

Rack Installation
7. From the rear of the rack, align the cable reel with the hole in the right
spring-loaded rack rail and secure it with an M6 x 1.0-12L Phillips screw.
Figure 3–3: Attaching the cable management reel
8. Tighten the thumbscrew into the spring-loaded rack rail.
9. From the rear of the rack, align the cable rack bracket with the hole in the
spring-loaded rack rail and secure it with an M6 x 1.0-12L Phillips screw.
Figure 3–4: Attaching the cable rack bracket
3–4 StorageWorks by Compaq 3U Rackmount Enclosure Reference Guide