My singer sewing machine 1507s bobbin case is disassembled and I don't know what to do

I was playing around with it and there is a piece stuck around my bobbin case that's shaped like A half moon and has holes in it and a circle piece, which is a hole septet piece of medle came out when I took away two black levers by mistake and now I can't sew
Asked Jun 10, 2016

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