Other 100 owners will chime in to verify but I'm going to say that upper dash hole not supposed to be there, light is add on, original key switch hole looks to have been enlarged, should be a D hole. However, the thing behind the brake may end up being an add on old school safety start or brake switch cable activated, looks interesting, maybe a dealer add on.
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(2) Original, 100, 102, 124, 73, 800, #1 and #2 cart, brinly plows, disk, IH184, IH244, 1948 F Cub
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