Reassemble and your done!!! Note: Some servos may not fit the exact description shown but you should be able to figure it out for other models quite easily after reading this tutorial. :-)
1.
Put a piece of tape across the top seam (This is where the gear train is and you don't want it to fall apart)
2.
Remove the screws in the back. It is very easy to strip these so be careful.
3.
Desolder the motor leads from the main PCB. An easy way to remove the solder is to heat it up with your soldering iron and the quickly tap it on the table. The solder will come of cleanly. Wear safety glasses when using this method!
4.
Desolder the wires from the main PCB and pull one off so you have one remaining.
5.
Solder the remaining two wires the motor leads as shown.
6.