So I am in the process of installing a wet nitrous kit on my 1987 5.0. I purchased an MSD digital 6 plus because it has a timing retard for nitrous. The wiring diagrams that came with the box didn't specify how to wire it for the timing retard. All it says is when 12v is applied to the pink wire, the retard function is activated. How do I wire the box to the distibutor? Any help will be appreciated. MSD technical support was no help.