IBM 5155 Manual To Operations page 289

63
Study the figure below and become familiar with
the various lengths of the options. All options
will fit into expansion slot 2. Expansion slots 4
and 5 can fit options that have any overall length
of less than 127-mm (5-in.). Expansion slots 6
and 7 can fit any options that have an overall
length of less than 120-mm (4 3/4-in.). Decide
which expansion slot you will be installing your
option. Continue with the next step.
7 6 5 4 3 2 1
Option Installation 4-61