Kreisen 3 8 6 X / X E - Manual (Page 160)

Power Connector - J6, J15
The system board requires four DC voltage: + 12V, -12V,
+5V, and -5V.
The power connector respectively supply power to the system
board and to the six expansion slots.
Speaker - J25
Connector J25 provides a speaker connection for audible tone
generation. The connector is a two pin header.
IDE Interface connector - J24
You use this 40 pin connector with IDE type Hard disk drive.
Note
Your system has an on board IDE type HDC and if you
want to install the another type of HDD except IDE, you
must disable the on board IDE HDC using the Extended
Setup Program. See Chapter 2 for the detailed information
of it.
If you want to know the detailed pin assignment of those
I/O connectors, see Appendix D of this manual,
System MotherBoard B-7