so here is the project. I am trying to use my Zex Nitrous bottle opener and found out it opens under reverse polarity. The Zex opener closes the bottle under traditional 12v normal situations. So the problem is how to wire this in without have 2 toggle switches.

The best idea I have cam up with is taking a window switch out of an older car here and retrofitting it into the dash or inside of the DIN adapter. Please chime in on idea's.

 

any ideas at all

 

anything at all?