Jason,The blue wire with the yellow stripe comes from the ignition resistor bank on the rear fire wall and goes to the starter solonoid. This wire supplies power to the ignition coil through the resistor. Do not hook it up directly to the coil. As for the ground. I have never had to track it, so I really can't answer any questions about whats behind the fire wall. All the diagram shows is the ground post on the battery going to ground. Hope this helps. John Hervey http://www.specialtauto.com/