I'm working on making an etchedr from a dc transformer. Its 12v, 1 A and was easy to take apart. As I understand it, and I'm weak in electrical, I need to add 2 wires to the output side of the big magnet dealie before the circuit goo. In Dan's example, it looks straight forward but mine has 3 wires coming from the magnet, 2 blacks and a red. I'm not sure which two to use. I was just going to tie into the wires. I dont know if this makes sense or is doable via pictures but I posted some below. I'd appreciate any tips or ideas. The second one shows the wires coming from the block.