I was the person involved in the design and development of the new bracket so I can tell you how to mount them with the new system.
"You put the mounting bracket against the bowl then the shield on top of the mounting bracket and then screw the lens holder on. If the screws are short then use the long 1" ones that originally were for the other mounts as they have the same thread pattern and are the same size as the short ones that already hold the lens holder on. I had 1 headlight that the short ones worked fine and grabbed ok but the other one was not wanting to bite down enough so I used the longer screws for it."
It will look like this when put together correctly. You see the bowl is at the bottom, then the shield, then the lens holder on top.