To clarify: I'm speaking of a mechanical brake light switch mounted on firewall per original. The ones they sell for $6 for AD and TF replacement. You can't wire them backwards, you could mount them in such a way as to operated backwards if you really tried hard I suppose. There are only two wires and you are either breaking or making the continuity. I'm not speaking about switches mounted elsewhere or pressure switches. I understand you had a situation with your kit and are advising caution and yours was for cruise control.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn