Okay How to Wind a 66 Bobbin.........
Put the spool of thread on the spool pin and then take the thread and feed it to the hook before the faceplate then bring it back to the bobbin winder. There will be a hole in the bobbin you poke the thread for the inside of the bobbin through the tiny hole and then take the tail and run it through the the large hole and then place it on the winder.
The thread then will go in the top of the winder arm then hook it under the arm in the notch.
Here is a better photo of the winding path, sorry they are a bit blurry..............
Billy