Sorry, I just noticed your last post was 1/2 hour ago. I’m assuming you’ve made some sort of decision already...
You can easily see the grain in the #1 and #2 image. Looks like you cut at a 45 degree angle. One trick is to cut a small piece off the end against the grain before you cook so you'll have a guide. By the look of the slices, it doesn't appear that it was cooked long enough even though it hit 203. There should be quite a bit of separation when the connective tissue degrades. That's why IMO, trying to hit some "major" temperature is ill advised. It's done when it's probe tender.