Complex sentence: In the manga, Gonzu transferred Alita into the Berserker Body under Ido's supervision because of the injuries Ido had sustained in fighting Makaku, and also helped Ido with the transplant for Hugo.
Split into simpler sentences: In the manga, Gonzu was the one who transferred Alita into the Berserker Body under Ido's supervision because of the injuries Ido had sustained in fighting Makaku. He also helped Ido with the transplant for Hugo.