I finally took some time and attached the rest of the necessary wires. I skipped PROGRAM, GOD ,3.3V, and VBat on the end since most of those are available elsewhere several times, or I don't bed then for projects and I can write them up later if I do.

There is a problem that 30 and 31 arm to have become bridged between the boards, but there isn't much I can do about those now. Taking it apart would likely destroy the teensy at this point. It is still 13 I/O pins I couldn't otherwise use!

I'll run some tests and then try soldering on the audio board. .