SOYO SY-P4X400 DRAGON Lite User Manual page 34

Hardware Installation
5. SPK5(optional)
Connect one end of the Audio flat cable to SPK5 connector in the
motherboard, and the other end to the small audio connector. (See
unpacking the motherboard in Chapter 1 for more info on the audio flat
cable)
Please refer to Appendix B C-Media sound solution for more information
on AUDIO function.
Note: Some 5.1 speaker have different center/base assignment.
Please use the C-media Multi-Channel Audio demo software to check
if sounds coming from the center/base speaker are correct. If not,
short pin 2-3 of JP1 and JP2.
SY-P4X400 DRAGON Ultra
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JP1/JP2