It looks like the perfect regulators safe switch uses shorting pins to turn it off. This is the same setup as the skookum power bus I'm using on my N7. I simply ran a short servo extention up inside the frame and 3M taped it to the frame right near the opening in the canopy adjacent to the clutch stack. Reach in pull the bind plug and the system powers up.
My prefered method these days is just to use the 3M tape on about everything electronics short of batteries. It has NEVER failed me and I have started using less of it on satellites as it feels like I'm going to break the plastic before getting it to release. Simple, neat, reliable and you can use it wherever you choose, not just where some random, sorry Matt
, designer thought you should have a mount.