Which audio pins do i plug into the motherboard?

Ok here is my terrible problem, in front of every computer case, there is a audio thing and a mic thing so u can plug ur stuff into, i have no idea how to make them work, the motherboard requires two pins to be plugged in but then the case has like 6 different audio things that confuse the hell out of me
motherboard: msi 970a-G45
here is a pic of my motherboard audio layout thing
http://i390.photobucket.com/albums/oo346/sgtcartman/aud...

my case is called xg sidewinder 2
http://i390.photobucket.com/albums/oo346/sgtcartman/sid...
, there are no manuels on the case so this is why i need ur guys help  
im supose to put one pin thing in the HEAD PHONE L needle and one pin in HEADPHONE R needle but mycase has alot of audio pins
i already tried various combinations but no success do i need to restart the computer after plugging in the pins?

pins the case gives me :
EAR L2
EAR R2
EAR L1
EAR R1
GND