I had this on my old blog. I was reminded when I watched a video and realized that maybe the way I do it comes from Judo. So instead of explaining I uploaded the pictures and you can watch the video I found at the bottom of this post.
Bring it around the body, and make sure it is not crossed on the back (not shown).
On the video below, he tuck in the other end first, it doesn’t matter which one goes first.