Hello, I have a Zetec blacktop with 45s running megajolt, the rev counter on my car doesn't work as it was just a feed from the low tension side of the coil when it had the old Pinto in it, I bought a Zenner diode from Trigger-wheels that sorts out the issues with the two coil packs but what wires do I join into coming from the Megajolt?

MK2 Escort RS2000 btw...