So I'm trying to re-wire a Staples "Easy Button" to be a single-keypress USB button. I found a couple of instructables on it, and it seems pretty easy... assuming I can figure out where to attach my wires to the buttons PCB. It seems pretty easy on the instructables, because you just sort of hook up the ground to the resistor on the PCB and then there's an exposed hole for the NO input. Then I'm using a TeensyUSB to translate the hit into the USB. So again, pretty easy.
The problem is that Staples have now updated their PCB twice. I found a video about the older updated one with where to wire, but I cannot find anything for the newer update.
My wiring skills are basic to say the best... I can solder just fine, I can kind of read a diagram, and I get the basics of how it all works, but I can't look at a PCB and actually understand how it's functioning to do stuff like this.
I've attached an image of the board, do we have anyone who can stare at boards and figure out where I'd want to solder my ground and digital wires to get just the button inputs? I've got a backup if they've just made that impossible now, but it's be nice to use this.
Thanks collective intelligence!
(Spoilered for picture)