"曲がる所教えてね。どこでまがるか教えてね。"
は英語で
Let them know where to turn.
Let them know when to turn.
where = どこで when = いつ
「曲がる所教えてね、どこで曲がるか教えてね、すべては君の案内にかかってるからね」
Let them know where to turn, it's all up to you.
Let them know when to turn, it all depends on your directions.