Recently I cleaned my motherboard D945GNT and for that I had to remove the cabling including that of front panel audio. From the front audio solution I get three separate cables and they are: Mic In Gnd[2pin], Mic Bias[1pin], S-L[2pin] and S-R[2 pin]. The motherboard has a 10pin audio port. I dont know where to connect which. I have attached the front panel specification of my motherboard for convenience. Most probably the audio solution is an AC '97 header.
[Just so you know my front panel has an audio_out and mic_in jacks and they worked fine]