Vent window frame problem 1970 b-body

I am trying to assamble my doors and found that the vent frames are different, the left one is missing (I think) the part where the bolt that goes in from under the door shall be attach. Is is a part that is riveted to the frame.(yes, english is NOT my native language)
I found a set on ebay and you can see that they have the same issue, is this how they shoult look or not? It has been so long time now so I don´t remember how they looked when I disassembled them.

I have a few of those, I'll take a look at them and get back with you a little later. They should both have the same mounting brackets IMO.

The both should have the brackets. Every car I've ever seen has had these broken off. Try looking in your door it might still be sitting on the stud, that's where mine are until I can get around to welding them back on.

Thanks guys! Now I know I must have one, better start looking on the floor in the corner where all parts are stacked.