A new version with a different thread and some fixes. If the outer diameter of your outlet is 12.2mm (the part without the thread) this should work.
Do not use much pressure on the bag, First gently squeeze the container to get some air out and apply soft pressure on the refill bag. Slowly let go of the container while soap gets into the bottle. Repeat this until the container is full.
You can use a rubber band to hold the refill adapter in place.
The author remixed this model.