Is this a "winged" deck lid?

Hey guys.....I have a question......my 72 dusters deck lid has what APPEARS to be factory cut out locations for a spoiler.......yet there are no holes in the top skin of the trunk where mounting bolts would pass through.....just on the underside of the deck lid.

Is this a trunk lid for a spoiler that never got a spoiler? or am I missing something and something else went in these locations?

any info on it would be appreciated!