IBM 5000 - Manual (Page 108)

Installing the Rack Model in a Rack Enclosure
b. From the front of the rack enclosure, insert two long screws through the
slide bracket and mounting rail. Press the slide bracket until it is flush with
the outer edge of the mounting rail; then, tighten the screws.
c. Attach the slide bracket to the left rear side of the rack enclosure.
1) Align the holes on the slide bracket with the cage nuts on the rear
mounting rail.
2) From the rear of the rack enclosure, insert two long screws through the
slide bracket and mounting rail; then, tighten the screws.
3) If it was necessary to adjust the length of the slide rails, tighten the
nuts on the slide rail, using pliers, a socket wrench, or an adjustable
wrench.
Chapter 5. Installing a Server in a Rack Enclosure 99