[PNJSNAK]

H-Rod is correct
The two metal brackets are for the roll bar mounting
I felt the roll bar was not tall enough, so I had made some extension pieces.
They were made from 1-3/4" heavy wall tubing with one end turned down to fit inside the roll bar ends and welded on.
I am trying to remember I think I added 3" or so.
This way it conformed to the rule about top of roll bar to top of fender straight line, your
The top of your noggin needs to be under the line.