IBM 5280 User's Setup Manual page 79

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b. Position the cable so that the yellow label is on top; then push
the cable end into the socket .
•• •• 11111111111111111111111 "'"
Note: If the cable end does not fit easily into the socket, be sure that
the connector guides line up with the socket guides.
c. Make sure that the snap-locks lock into position.
7.1 Repeat this procedure for the remaining diskette drive cables.
Note: Not all sockets (both data station and diskette drives) will be
used.