Where does this mystery dash part go?

[Bentworker]

71- with AC.

Any clues on where the heck this part goes?  My parts car is non-AC and is missing the heater box so it was of no use to solve this puzzle.

I thumbed through the assembly manuals and did not see it.

Thanks for your time,

Peter

 

[Aris]

 

[Bentworker]

Oh crap- guess the heater box is coming apart.   Thank you!!!!