In short, I don’t think you can. Dual pedals have slightly different designs than the majority of 125B builds. You could still use the power leads on the auditorium but that’s pretty much it. You will need to solder foot switches and jacks to the Paragon board to test it.
Edit: actually you may be able to connect the in/out pads on the auditorium to the corresponding ones on the paragon (and one ground pad).