Below is just part of the thread:
----------------------------------------------
1 - Analog Ground
2 - Analog Headphone Out Left
3 - Audio Backpanel Mute -- short to ground to mute the backpanel (when headphones are plugged in)
4 - Analog Headphone Out Right
5 - same as #3
6 - Mic input from front panel
7 - key pin (shouldn't be there)
8 - VREF out -- voltage reference for Mic
9 - MIC IN MUTE -- ground when mic isn't plugged in, +12VDC when mic is plugged in
10 - Audio cable detect -- will be ground when headphones are plugged in (not normally used)
=================
These are for the set of pins in the upper left of the card (in the white area
-- EDIT --
Ghostrider reminded me that I forgot to say which is pin 1. It's the one on the far right, next to the SoundBlaster logo.
-- END EDIT --
I don't remember if I had to switch the left and right output connectors to the front of my Antec Sonata case, so if it doesn't work one way, try the other. The only real problem I've had is I have to jiggle them around a bit to get them in the right position initially. I have yet to figure out a way to get the connectors to fit in tightly - right now I have the tops held together by a rubber band to try to stabilize them. If you have any questions or want me to take a picture to show you what I mean, let me know.