WHERE TO PLUG IN MIC BIAS and MIC IN?

you need to plug it in a rabbits ear. the mic bias goes in rabbits left ear, the mic in goes in rabbits right ear. You dont want to know where the sound out plugs into

I can't tell what soundcard that is from that pic, post a pic of the other side but its very likey that you won't be using your front panel 'mic in' with that soundcard as it does not have a mic header on it. You would need to wire the mic lines to a plug and plug it in the correct jack in the back

Its C-Media 8738 5.1 sound card. Ok i 'll try.

c-media 8738 is the audio chip used not the brand of the card. You might not have a mic in jack if you use it 5.1 mode. Try to find the manufacturer and download their users manual.