You'll have to make your own diagram, but this should give you a start.
Its a schematic for 67-9 A-body with the mentioned mods wired in as guesses about the connections.
On the 70 up voltage regulator, the sensing wire must be the same as the power feed. The green wire connection is the ground side and the regulator controls hpow frequently to complete the circuit to ground. According to the MTSC, they attach as shown in the triangle. I don't have one in hand to confirm that.