Ok I took some photos to help others that wanted to see how I mounted the monitors. I had to disassemble the monitors from the frame to be able to take these photos.
This shows the two pieces of wood that form an angled lip for the main 50" monitor to rest on. It's not easy to see but there is a small section of the wood cutout on the left because something on the TV interfered and the cutout is needed for it to sit flush:
To secure the main monitor I fashioned a piece of aluminum that attaches to the wood frame and I drilled holes so that I could use 2 M8 screws to attach the bar where the vesa holes are on the TV. I may make a second bracket later for the lower holes but it held fairly secure with just one bracket:
For the top monitor I broke the mounting bracket apart from the original monitor stand and mounted it to a piece of wood using 6 screws:
I used another piece of wood as a spacer between the bracket and the board. I really can't remember why I needed the spacer. It either made it easier to mount the board or it made it so that the board was centered on the frame better when mounted:
Turn the board over and the bracket snaps right onto the monitor:
Due to the usb ports on the monitor the top left side of the frame needed a section cutout so the top monitor will sit flush:
Here's a view from the back showing the top monitor board screwed into place holding the monitor secure. Once mounted you can't remove the top monitor by pushing the button to unsecure the bracket due to the fact that the top of the monitor cannot be tilted back to create the angle needed to release the monitor from the bracket. I had to remove the screws from the mounting board to get access to the monitor for these photos: