Anyone able to post up a few pictures of the correct non A/C heater box bolt (or setup) that attaches the front of the heater box to the underside of the dash?

Couple pix with a scale would be perfect, or if anyone knows where to purchase one that would be helpful too.

Mine wasnt there when I removed the heater box from my current project (1970Cuda if it makes a diff)

Appreciate the help