The plastic key gets discarded. I made a steel key, and also sacrificed a 1/4" u-joint from the tool collection. This key gets riveted to an aluminum torque tube.
In the cockpit, I’ve painted the handle red and labeled it. That little bracket screws onto the angle forward of the wing spar tunnel. It’s a loose fit.
In the old thread, it was mentioned that the conventional master contactor weighs about 13 oz. When I weighed all the parts it was about 2 oz less.
As I write this, I’m approaching 4 years of flying (on 7/25) and we have 478.5 hours. I have a couple of spare battery disconnect switches but have never had to swap. It has a pretty easy life - we only turn it off when there is pretty much no electrical load.
Battery “Cut off switch” “Master Contacter” these are are new terms to me.
I have always known this sort of devise as a battery “Isolator” or " Isolation switch " which seems to describe it’s action/function more precisely than the aforementioned.
