IBM 5280 User's Setup Procedures page 72

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d. Repeat this procedure for the remaining data station cables. The
remaining socket numbers may be combinations of 1, 1/2, 2, 2/3,
or 3.
6. The auxiliary diskette drive cables attach to the 5288. The
5288 diskette drive sockets are colored coded yellow and
numbered 5 through 13 .
.... • 11111111111111111111""",
7. If you do not have a diskette drive cable(s) to attach to the
5288, go to step 9. If you do, read and do the following four
steps before connecting the cable.
a. Find a cable with a yellow label. Read the identification label.
For example, if you find a cable with the following label, this
cable connects to socket 8 on the 5288.
Aux Data Sta XXXX
Location
Unit~
Socket on Prog Unit
.!!.
Device Address
2QQQ.
From a 5281 or 5282
To Socket 8 on the 5288