YOU SAID:

He had no clue where up his hair

INTO JAPANESE

彼は自分の髪の毛がどこにあるのかわからなかった

BACK INTO ENGLISH

He did not know where his hair is.

INTO JAPANESE

彼は彼の髪がどこであるか分からなかった。

BACK INTO ENGLISH

He did not know where his hair is.