My first build, I am using the SPMFC3207 quad racing flight controller with db:Theory XL. I know to connect the red and black wire from each electronic speed controller to the pdb. My question is, how do I connect my signal wire from each electronic speed controller(There is a black and a white wire from each esc. On my power distribution board there are four pads that say signal 1, signal 2, signal 3, and signal 4. Do I just solder the white signal wire to each pad? If so, what do I do with the black wire? Thank you.