Were does this wire go?

[Ben Simpkins]

I was taking the gauge cluster out of my 66 Satellite to figure out why my gas and temp gauges weren't working and I found this wire that was already unplugged. Can you help me figure out were this goes? Thanks.

 

[pnora]

If it is dark blue with a tracer it was most likely for and oil pressure light. That should be a keyed 12 volt if I am right, It put power to the bulb and the oil sender completed the circuit to ground.