IBM 5155 Manual To Operations page 324

2
Align the module pins and the connector with
the notch facing the top of the 64/256KB
Memory Expansion Option. Firmly press each of
the nine modules in place.
• If the pins do not align properly, carefully
~
bend the pins until they do.
Warning: The pins on the module are easily
bent. Check to ensure that alignment is
correct before pressing them into place.
Notch Faces
the Top
Connector
4 64/256KB Memory Expansion
January 1984