You have 2 of the 5 peices. You need the back half of the 1st pic (chrome vent is sandwiched in between these, a large hose and the flapper assembly that bolts to the cowl. look under your dash for that piece.
Here is an assembled pic from Ricks, you can see your first pic is upside down (and missing a clipnut) and no, that is all there is. there is a tab/slot that holds the bottom to the dash and a screw in the top.
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