Can you link to the STL for that bracket? I can't find it in the STL 3d printer thread.
If I remember correctly, everything that lights up on the running light power wire also lights up when you put power to the brake light wire. I think I just ran the Goblin harness's third brake light power wire to the brake light wire on this light and heat shrinked up the running light power wire, but I'm not sure on my recollection. Shouldn't make a difference either way.Did you wire both lamp and brake to power. Or just brake?