IBM PS/2 35 SX Hardware Maintenance Reference page 18

IBM PS/2 Model 35 SX, 35 LS, 35 SLC HMR
Keyboard Connector and Pointing-Device Connector
1.2.8 Keyboard Connector and Pointing-Device Connector
The two 6-pin connectors at the rear of the system board are for
connecting a keyboard and a pointing device (mouse). The keyboard
connector is marked with a small keyboard figure molded into the back
panel; the unmarked connector is for the pointing device. The interface
logic does not allow the keyboard and the pointing device to be
interchangeable.
¦ Copyright IBM Corp. 1991, 1992
1.2.8 - 1