I recently put together a computer for my girlfriends mom, and I can't figure out how to connect the Front-side Audio connectors to the motherboard.

In the motherboard manual, it has this for pin assignment:

1: MIC
2: GND
3: REF
4: Power
5: Front Audio (R)
6: Rear Audio (R)
7: Reserved
8: No Pin
9: Front Audio (L)
10: Rear Audio (L)

But the connectors on the case are:

MIC IN
MIC BIAS
GROUND
SPKOUT L
SPKOUT R
RETURN L
RETURN R

I'm not sure what is what. Any ideas on how to connect these?