Wheel with a flat that should fit the motor shaft, a nice groove to fit ...

...some kind of rubber band into and a connector (that doesn't seem to cause the wheel to be rotated when it is attached)

For some reason even though I have rotated the connector 90degrees to point in the direction of the slot it doesn't rotate the wheel when it is attach()ed to the motor.  I'm not sure if this is an issue with the motor or with the wheel, or with my understanding of what attach() is supposed to do.