Things I've found out, the Canare F12,on the plug in part, the tip is left channel, the center section (between the 2 green lines) is the right channel and the last part is the ground.
So on the back, the long part that sticks out, I believe that's were you wire the grounds.
For wiring the right and left channels. I believe the little pin that sticks out from the center is the right channel
and the ring that goes around it is the left channel.