AC/Heater control bracket help

I have a 72 Valiant with AC. I am trying to put the AC/heater controls, radio and ashtray back in the dash. I am not sure where the "J" shaped bracket goes. It looks like the hooked end should hold the defroster duct. Does anyone have a diagram or pics to help me put everything back correctly? THX

This is not the best photo. It is thin sheet metal and has a piece of foam glued to it. The end where my hand is has slot cut for a screw or bolt to go thru.

I'm not familiar with the later A Bodies, but I bet you're probably correct in that it might support a defroster hose. The question - which I cannot answer - is where does it mount under the dash?