RTA Products RTA-8338 - Manual (Page 7)

P.7
Use Screws (D) to assemble the CPU Side Panel (8)
to the CPU Panel (9). Use Screws (D) to assemble the CPU Tube (10)
to the CPU Side Panel (8).
Fix the Casters (3) to the CPU Panel (9).
Make sure to install the ones that
have the stop at the front.
Tighten all the screws and enjoy your unit!