This connection is usually found on the motherboard of a computer, or on a SCSI interface card.

Pin     Name
50      I/O
48      REQ
46      C/D
44      SEL
42      MSG
40      RST
38      ACK
36      BSY
34      N.C.
32      ATN
30      Ground
28      Ground
26      Termination Power
24      Ground
22      Ground
20      Ground
18      Parity
16      Data 7
14      Data 6
12      Data 5
10      Data 4
08      Data 3
06      Data 2
04      Data 1
02      Data 0
All odd pins, except pin 25, are ground. Pin 25 is open.