Correct the old school tanks DID not have brake light only twin tail lights, but..... They CAN be moded, and that single hondaline ready fit light isnt easy to locate---- if i was you, id hallor @ jeep, he did a nice mod on a a tail light, turned it into a super brake/tail light.
Goober, the reason i located those two wires is because of YOUR research not mine so all the credit goes to you! and yes .... I installed a brake banjo switch (off the top of head) i think the threads r 10mm x 1.25 thread pitch ?? (Really have my mind on other issues, MY BAD) to the front brake hydraulic brake T fitting, and on the plus side ..... It's the lowest psi activating single ported banjo switch i could find, i tried my best to locate a couple for fishes mod, NO luck, and i have no part# BUT, the it's brand name is is ether louper, or looper, moto cycle brake banjo, as i said ....... A very very low psi switch, BUT i engine brake (down shift @ low rpm and tap the front brakes for added control ) I'd toss up a pic, but ..... Well with the mess thats going on, i can't post a pic.
I'll see about tossing a pic up in my profile pictures, and the brake light ..... Is The rare hondaline brake light were made by stanly (i believe) and i think Mac may have more imformtion , cause i know he's got one haha!
Goober if you find my post ..... Post a pic for him, and there's a pic of that brake banjo here too, your more then welcome to snatch um up.