Gigabyte GA-8IE533 User Manual page 72

Advanced 6 Channel Analog Audio Output Mode (using SURROUND-KIT):
" SURROUND-KIT" is an optional device, which access
analog output to rear channels and Center/Subwoofer
channels. It is the best solution if you need 6 channel
output, Line In and MIC at the same time.
STEP 1 :
Insert the " SURROUND-KIT" in the back of the case ,
and fix it with the screw.
STEP 2 :
Connect the " SURROUND-KIT" to SUR_CEN on the
M/B.
GA-8IE Motherboard - 68 -