First, you plug the main "neg" lead. Second, you plug the "by-pass" resistor lead, and third, you plug the main "pos" lead.
On the batterie side, the by-pass lead have a 20 ohms resistor in it. And i use Schulze 3mm bullet for it.
http://img220.imageshack.us/img220/6650/sparkmodfg8.jpg