How to solder wires on 4PDT switch to control Guitar Pedal

I have a guitar pedal that has just one button, when pressed, a loop which allows for effects to be in the signal chain is engaged. It’s great except I still have to click the footswitch to engage, whereas I would like to solder components onto its main 4PDT switch so that I can control it with a simple latching system like this http://www.voodoolab.com/controlswitcher.htm

I am attaching the pedal and the back of the circuit, please let me know if you have an idea of doing this, I cannot find documentation on any of these switches.