Something looks off. Your hand brake bracket looks like it is upside down. See images on other threads:
https://cj3apage.com/Forum/index.php?topic=4006.msg34159#msg34159https://www.thecj2apage.com/forums/emergency-brake-cable-routing_topic34839.htmlThen the cable and clamp will go on the outboard side of the bracket. Also, notice the spacing between the cable bracket and the breather bracket. Could either (or both) of the breather brackets be bent?
Have you attempted removing the inner breather bracket from the firewall, attaching it to the breather and then attaching that to the outer bracket to see if it still sits over the same holes? I believe the breather brackets are supposed to have captured nuts on the inside of the firewall.
https://cj3a.info/sibling/cjv35u/firewall35.html