Instrument cluster brace

I am In the process Of reinstalling the instrument cluster In my 67GTO. I have the steering column out of the car, Have Got all the wires and lights and instruments installed in the bezel. The problem is The brace that attaches To the back of the speedometer That Supports And grounds Everything I can't find out Where it attaches to the car! It appears to be positioned where the steering column goes.
Can someone PLEASE tell me where the brace attaches to the dash???

Thanks,
LET