Wires for DC Motor
The DC motor includes wires but they are not long enough to reach the circuit when installed. So we'll need to remove these and add some longer ones. The ground wire should be about 4 inches long. The voltage wire should be about 6 inches in length.
You can remove the wires from the motor by heating up the solder joints with the tip of the iron. You can keep note of the polarity if you'd like. The DC motor will rotate in the opposite direction if the polarity is reversed. I used a panavise jr. to secure the DC motor in place while soldering.
New Wires for Motor
Now we can attach the new longer wires to the DC motor. Note the orientation of the wires, they're attached horizontal instead of vertical like the original wires. Having the wires in this orientation makes the assembly easier.