Next was the ground wire on the battery adaptor. Drilled a small hole on the shoulder. Filled the hole with silver solder and put a black wire in it. I tined the black wire first. Now I have power and ground up to my battery holder. I want to stop by, get a small red LED and find a switch that will work. I still just might make my own switch if it comes down to that. Was able to touch the red wire to the pos of the battery and give it a test smoke. It worked very well. Can't wait to try a dual coil tank on it.