These are the carbon brushes for the motor of that machine. What do they do? Well, they actually transfer the electricity to the inner magnet, causing the whole spinny thing to occur. These ones are in great shape.
and they came out of THIS mess. the photo is worse than I realized, you can't see the insulation on the wires has become this sort of revolting semi solid gunk.
So, I cut the old wires off:
and soldered new ones in place!
I LOVE liquid electrical tape...