It might be a multilayer PCB (more than two layers). If so, then just looking might not be enough.If anyone has examined the switch wiring with the cover off, can you confirm true or false for that?
When I desolder the old, broken switch, I can use a multimeter in continuity testing mode and try touching nearby solder pads to see if pin 1 does indeed go to something else. There's a capacitor right next to the power switch.
I'll get the batch of new switches May 6 and report back with my findings. The $4.99 shipping cost more than the five switches.