IBM IntelliStation Z Pro Type 6866 User Manual page 157

b. From the front of the rack enclosure, insert two long screws
through the slide bracket and mounting rail. Press the slide rail so
that it is flush with the outer edge of the mounting rail and tighten
the screws.
c. Attach the slide bracket to the right rear of the rack enclosure.
1) Align the holes on the bracket with the cage nuts on the rear
mounting rail.
2) From the rear of the rack enclosure, insert a long screw
through holes in the slide bracket and mounting rail; then,
tighten the screws.
Appendix B. Rack mounting your computer
141