Cant do a pic but i can try to explain it.
The spring sits right below the top cover piece and above the stick.
So all you have to do is put the nub almost completely back together. Have the spring on top then put the top cover over that.
It took me a bit to figure out how to make it fit but i found that if i applied pressure all around the nub while moving the stick around and pushing the spring back inside it will eventually pop back in and you have a working nub again