Front Panel Audio Pin Assignment

[owensdj]

The front panel audio connector on the motherboard has connections labeled Mic In, Ground, Mic Power, Audio Power, RT Line Out, RT Line Out, LFT Line Out, and LFT Line Out. The audio connector on the case has plugs labeled MIC, MIC.BIAS, FPOUT.R, FPOUT.L, AUD.GRD, RET.L, and RET.L. The motherboard has jumpers connecting the two RT Line Out and the two LFT Line Out pins. Could someone give me some pointers on how the case connectors and the motherboard audio connections match up? Thanks.