IBM RT PC Options Installation page 109

Installing the Covers on the System Units
Ensure that you have installed all options before you install the covers on
the system unit.
Note: Do not operate the system unit with the covers removed. Operating
with the covers on ensures adequate cooling of the components.
mM 6150
System Unit
Do the following to install the covers on IBM 6150:
1. To install the left side cover:
a. Insert the top hooks in the loops in the top of the frame.
b. Rotate the bottom of the cover inward and snap the cover in place.
a
a
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Options Installation