IBM 5280 User's Setup Manual page 61

54
10. If the auxiliary data station has a diskette drive(s),
go
to step 11. If
not, go to step 12.
11. Read the following four steps (a, b, c, and d) before
connecting the diskette drive cable.
a. Look at the diskette drive socket with the yellow label. This is
where you will connect the diskette drive cable from an auxiliary
device.
Yellow Label
""' - II
Drive Socket
b. Find a cable connector with a yellow label.