Translation of "Crevice" in Japanese

And we'll try and get the line across and get it to jam in a crevice.

裂け目にこれをはめて わたってみるよ

Yeah, that's jammed in a little crevice over there. Okay, let's tie this off, here we go.

小さな裂け目にかかってるぞ よし　結んでおこう