IBM H Series Installation And Service Manual page 22

I/O Board Locations Model H70
J16
J15
J14
J13
J11
J1, J3 SCSI Port 2 connector
J4 Ethernet connector (thick)
J6 Serial ports 1 and 2
J8 Keyboard port
J10 System board connector
J12 SCSI port 1 connector
J14 Operator panel connector
J16 Power supply
J19, J20, 32-Bit PCI connectors
J22, J24
J29 DASD backplane connectors
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RS/6000 Enterprise Server Model H Series Installation and Service Guide
J12
J27
J29
J10
J2
J5
J7
J9
J11
J13
J15
J17, J18,
J21, J23
J27
J24
J23
J22
J21
J20
J19
J18
J17
J9
J7
J8
J6
J5
J4
J3
J2
J1
Ethernet connector (twisted pair)
Parallel port
Serial port 3
Mouse port
Power supply
Diskette drive connector
Power supply
64-Bit PCI connectors
Fan monitor card connector