The section above the low wall cse is 45 inches. Old low wall is 30 inch car panel. 68 would then be ten inches above old line? I found some wall focal instructions that show 68, 53, and 50 inch panels or some selection similar...
I think a 68 inch panel is too heavy for the wall bracket for where they can go. Not sure. I've never really studied them much, but there's only one or two for the low wall, at half the height/ weight.
Sent pics to no support. Hopefully theu have ideas. Otherwise pptl said I can stash them in the hallway in the tl office. You know since we randomly decided to get rid of any storage trailers in the group.