[Bob Carriere]

Usually broken at the small end just above the hole for the cable . Found one set of 2 from the remains of 4 cab11/12. Made of white metal they could be reproduced/cast quite easily.. Although needed for appearance once installed and connected you realize that the negligable amount of air that flows through the small vent hole is not worth the effort.......leave the holes open and do not put any stress on the bracket trying to close/open the vent.

Cheers