"Brake lamp warning switch" wireing location

Hi all, I've been on here on and off for the last 12-15 years. But stalled out on my project about 6 years ago and have forgotten my username and password, so I made a new one. Anyways... here's the thing I need help with. I have a 69 dodge dart that came with a 318 and I am just finishing sticking a 383 in her. I've almost buttoned up all the witing, I'm down to the alt. and this wire called "brake lamp warning switch" in the engine bay. Where does it go? Pictures help greatly. Thank you. I'm so close to getting her back on the road in time for summer!

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