New wiring for our ‘67 B’cuda

I'm not aware of another '67 ballast resistor mmounting location for '67 but ???
Here's a closer a view
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Neutral Safety Wire.
That was a seperate wire in '67. According tothe ***'y drawing it got routed back to the firewall, up through the harness clip and across the firewall to the clip on the passenger side of the transmission.

Another helpful photo from @Cuda Al
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Reverse Switch Wiring
If the car still has the original reverse switch, then it is probably wired as it was in '67.

On automatic with column selector, the switch is on the steering column.
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As long as the actuator pin isn't broken, your good to go.
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The reverse switch connector orignally mated to the connector with a Blue and a White wire.
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The factory wiring diagram are not clear that it is illustration all options for reverse switch.
Manual transmission reverse switch locations are on the transmission. For those cars the blue and white wires get connected to the bulkhead multi-connector.

White is power. It comes from the windshield wiper switch, which gets it from the key switch 'accessory' terminal.
We figured that out here: Wiper Motor Wires

Optionally you can run the 3 prong combined NSS/reverse light switch with that newer 904.
Connect the white and blue wires to the bulkhead cavities like it was a manual transmission car.
Then make up a harness to the NSS like a '69 had.
I did that to get around a broken reverse switch pin.
'69 shown here: Incredibly dumb question..Trans pig tail