Now, just because I had the square on top doesn't mean that you have to, feel free to flip it over and then you will stop in the seam, it depends on what mood I am in to how I do it.
As well if you are having a hard time once you get to the junction, feel free to pull it off there and go from the other side, in this I found that I was doing more than one y and usually you can do the same but start in the middle, these are so small that may be difficult,