Well, I know for sure I messed up, since all I get now on line 1 is noise. No DT.

The wires that were connected to the pins previously were connected via what looks like little springs that wrapped around the pins. I couldn't get fancy like that and just wrapped the earphone wires as best I could around the pins in question.

It wasn't easy, there's not much room to move back there. I also accidentally disconnected the jumper that was connecting one of the pins on slot 1 with the same pin on slot 2. Tried to do a shoddy jumper job to repair that, but I'm quite sure I messed up.