c. Stretch the spring slightly and push the other looped end of the spring
onto the other stud on the inside of the rail.
3. Working at the front of the rack cabinet, identify the two standard rack units
(2U) of space in the rack into which you want to install the support rails.
Figure 10 on page 15 shows two rack units with the front mounting holes
identified.
Figure 9. Installing the rail spring
14 Storwize V7000 Gen2 and Gen2+: Quick Installation Guide