Over Voltage with New Battery Disconnect Switch

Little update. I think I have found the best way forward for my situation. I plan on "breaking" the red and black wire that runs in series with the amp meter under the dash. I have already deleted that gauge and they are currently connected together via a nut/bolt.

With how I wried my ignition box and fuel pump relay switch when I disconnect those two wires the car shuts off. So my plan is to run a 10ga wire from the red wire to the master disconnect, then run another wire from the other side of the master disconnect back to the black wire which should take care of all this.

I know it wont shut the entire power off to the car but I believe this will meet NHRA rules as the car and fuel will shut off with 1 push of the switch (accessed from outside the car of course)

Thank you again for all your help