Single wire reverse light switch for 68 Barracuda

I guess I'll just reinstall the one I have and use the center pin with my 1 wire harness ? I really didn't pay enough attention when pulling the car apart I'm not sure how it was wired? How I ALWAYS seem to have the odd ball , 1 year only , transition stuff amazes me LOL. I got a great deal on a 79 Sportster when I used to ride motorcycles only to find out that's a 1 year only "transition" year bike. The list goes on...…...