Vent Window Division Bar

[rmr_69c10]

I ordered some new division bars for repairing the vent windows. Did I misunderstand the parts intention? I thought they were inserts to the existing vent window frame once you cleaned out the old felt, glue, etc. Instead, it looks like you are supposed to measure for and drill holes, and then re-attach the vent window brackets and door retaining brackets with rivets. If so, that's not what I wanted. I just wanted a good kit to redo the felts and keep the window snug.