I’m so so sorry for dropping the ball on this.
We’ve not published PCB layouts publicly, but I’m happy to share docs. This one is fairly straightforward: the pin on the left should be bridged to the equivalent pins on the switches to the left and right of it and the pin on the right should be connected to the column’s test point with a 1N148 diode.
I too, am very much looking forward to the upcoming Model 100 Kickstarter campaign. My favorite new feature is the hot swap keyswitch sockets for MX mount switches.