Shifter Removal

How do I go about removing the push-button shifter from my '63 Dart? I've already got the dash out, but I can't figure out how to remove the shifter. I think I have to remove the shifter plate to do it, but I can't find the button to push to release the light switch.

It's kinda odd, the service manual covers removing the instrument cluster, but not the shifter. =/