This is the correct bracket NOS.
https://www.flickr.com/photos/advance-design_parts_co/8129413707/in/album-72157631868452754/
Here is a complete original set-up and as you thought the thick rubber grommet and bracket is for the temp rod.
https://www.flickr.com/photos/advance-design_parts_co/8129343557/in/album-72157631868452754/