Dell EMC PowerProtect DD9900 - Sliding the Shelf Onto the Rails; Rail Tabs Securing the Rear of the Shelf

Figure 56 Sliding the shelf onto the rails
When the shelf slides to the back of the cabinet, the rear tabs on the rails click into the
notches in the rear of the shelf. The tabs secure and support the rear of the shelf.
Figure 57 Rail tabs securing the rear of the shelf
CL5994
2. Secure the front of the shelf to the front vertical channels with four screws (two per side),
but do not tighten the screws until they are all in place.
Install the Disk Shelves in the Rack
Dell EMC PowerProtect DD9900 System Installation Guide 61