2. Assemble the thumb and add horn to the motor and attach to the thumb.
3. Assemble all the fingers as per this order.
4. Assemble the thumb along with motor to the hand.
5. Assemble the wrist to the base of the hand matching the holes.
6. Assemble the Motor holder to the forearm.
7. Assemble the all 4 motors to the motor holder.
8. Assemble the forearm to the wrist.
Make the connections as per the image, Use external 5V power supply for the motor and to this same Arduino any sensors can be connected and programmed to work the prosthetic hand.