[davew833]

It's been a while since I've had one of these apart, but those freely-hanging rectangular (carbon) blocks on woven copper wire are the "brushes" for the motor, and there should have been some small springs behind them that would push them out of their housings against a copper cylinder called a commutator on the motor shaft. In order for the motor to work, the brushes must be in contact with the commutator- The springs hold them in place as the brushes wear down. They're kind of a pain to align and push back into the housings while you push the motor winding and shaft down into place.

Chances are the little springs bounced off into a dark corner of whatever space you were working in- ask me how I know. Your parts motor still has them though. Be VERY careful and attentive if you decide to take that one apart too.