Late 31 stop light switch replacement

[tomslick69]

I am rather a newby to Model As and this forum. It appears that my stop light switch has failed. This is the type that mounts to the crossmember behind the transmission. I've ordered up a new one, but am unsure how it attaches to the brake pedal rod. Do I need to remove the pedal clevis and pull the entire rod or does the switch thread onto the rod in place? Any help would be appreciated.