Hi everyone!

Last weekend I installed GTSPEC 6pt rear subframe brace. Unfortunately instructions it came with was in Chinese. I did what I could. Now I have problems

The brace bangs when I go over bumps, etc. I can even feel the play when I press it by hand.

The questionable step was connecting brace to the frame (right under side skirt). Kit came with bolt, strange looking nut and washers as hole in the frame isn't threaded.

I managed to pass nut inside the frame through other hole. All the bolts are tight, but there is a play since nothing prevents the the whole assembly to move up-n-down in the frame.

Does anyone installed this part himself? Any help much appreciated.