Are you talking about the clips that lock it into place?
Yuneec Typhoon H Arm Latch
Short video of replacing them:
Ah, you mean this one:No. The knee bracket were the clips fit into it. Thx
If that piece is broken, the bottom shell is often broken as well and sometimes the sub frame. I just rebuilt one with similar damage. Had to replace top and bottom shells, frame and 3 motor arms.