internal microphone cable pinout?

Im turning my iMac 2006 into a monitor with speakers, mic, and camera, and I got the speakers to work with an amplifier, and spliced the iSight camera to a usb cable and it works (although its a little dark) but I don’t know how to do the microphone, I tried splicing it to a audio cable and plug into my line in port on my newer iMac but no sound comes through. should I splice it to a usb cable instead? what is the pinout?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0