1. tyvm!
2. I did that but nothing that I could see happened. Unless you mean Enter Combination 1 into cave 2 and Combination 2 into Cave 1?
3. Unlock scroll? mk simple enough.
2.
Cave A has the combination for cave B.
Cave B has the combination for cave A.
You need to return to cave A after you entered the combination at cave B. Same thing goes the other way around.