Well, the source shows the tassel with year inside the ball. Either the mouths of my ornaments are smaller, or my years are larger, or both, because I couldn't do that. So, I did this instead.
Basically, I removed the years from the tassels and added a short chain to hang the years outside the balls. I just strung the tassel rope through the first link of the chain on each. Here's a close-up so you can see the detail, whether you want to or not. :)