run the dark blue/ blue w tracer wires to the "ign" terminal on the v reg which is the "top" terminal in the triangle w it "up" like a pyramid and T off of this line to either alt field terminal. The OE green wire, run it from the other alt field terminal to the "side" terminal in the triangle. You can trim the sides of a '70 up flat v reg & it will nestle neatly in the squarish firewall recess where the OE mechanical "box" type resided & redrill 1 hole on one of the sides of it