I did take a quick video of them but I didn't see anything else underneath them or on them that had more numbers (other than what's visible on the picture)
Here's the video link:
https://www.youtube.com/watch?v=iZt0oi6FXew
It looks like they're mounted to a black piece of plastic which is mounted to the aluminum. The black piece is covering the back of the boards. Id rather not remove them from the black piece but I will if you think more info might be there...