1971 Demon Rallye Dash schematic

Dana67Dart said

View attachment 1716196204

Red is dash illumination
Green is most likely left turn signal
Blue MIGHT be oil pressure indicator light

Click to expand...

Blue is the High Beam indicator.
The corresponding hole on the other side of the center pod is the brake warning light.
I don't believe there's an oil pressure light on Rally Dashes. Maybe some years, but not '68.