To thread the needle, please follow these steps: 
- a. Have the Needle Threader Tool ready. b. Locate the thread with Threader Tool.
 - Insert the Threader Tool through the FRONT of the cartridge and then through the needle hole to the back.
 - Insert the thread into the wire from the TOP.
 - Pull the Threader Tool out and leave at least a 6 cm / 2.5 inches tail of thread.