You know what, I got it mixed up with the ARF. I just looked at the manual and noticed the wing hold down plate is at the front of the wing, not the rear. The ARF however is at the rear of the wing and that was the one I was thinking of. I added blocks to it because the plate was weak and the wing flexed too much. On my kit built, which is not done yet, started it 8 years ago!, I put 1/2" triangle stock along the front of that plate and the former, and used the T-nuts on that one, just looked at it to confirm after looking at the manual page 52 shows a picture of it.
I attached the manual, which can also be obtained from various websites, so no copyrights are broken sharing it.