Rival Vintage Saladeer Shred-O-Matic 1070s

This vintage Rival Shred O Matic Saladeer, salad maker model 670 in harvest gold was made to grate, shred and slice. It comes with the pictured attachments and has a suction cup to stick to the countertop. These were made in the early 70s. I cannot figure out how to attach the blades but I don't think it is broken, just don't know how to do it. Those parts of the machine are pictured.