66 Barracuda rear bumper pads or guards?

I'm stumped on those end mounts. My first thought was a CB antenna but two would not be needed and aluminum angle portion seems to lightweight to support one. Two far apart to be trailer safety chain mounts. Then comedy took over and I speculated that they were deer whistle mounts so you didn't hit one while backing up on rural roads. Nice fabrication effort though, matching the bumper contour with that base piece.