in the hope that에서 that의 문법적 역할

“He might as well put his manuscripts away in a safe, in the hope that, some day, there may be a generation for whom his words will come alive.”라는 문장입니다.
여기서 in the hope that은 ‘~을 기대하며’라는 뜻으로 해석되는데, that은 접속사인가요?
어떤 문법적 요소인지 알려주세요.