Great instructions on replacing the sharpener. My father took the model 18 apart but failed to document with pictures on the step by step breakdown. I'm left with out a crucial part of the re- installment. The question is in step 7, the piece right behind and below the screw driver is a plastic piece with two wires comming out of it. where does this piece fit? any help or redirection to a site that might have this info. direct reply at