1971 Demon Rallye Dash schematic

Any of these will work green circles

Screenshot_20240122-192202~2.png

Screenshot_20240122-192603~2.png

If the cluster is out it must be grounded to function on a power supply.

If the cluster is in the car the lower ( I believe) mounting screws provide the ground. But don't quote me on that.

It is that way in 67.