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I am sure I am going to answer my own question here. I have on my 1972 Crossover with one screw headlight rims, which retain the lense/main headlight. Today I took one of the rims off to investigate how much room is behind. There was some angled brackets attached to the inner rim. I take it that the brackets don't serve a purpose anymore as I have a superior retaining rim which would have been the three screw rims in the past. The bottom one has rusted and I didn't want to replace if there wasn't any need for it.
