How can I get up to Othello's cage?

Hint 1 of 6:

You're going to have to make your own climbing gear to get up there.

Hint 2 of 6:

Part of that gear is a piece of rope or something similar.

Hint 3 of 6:

The customer's leash will work.  One of the earlier questions in this section
will tell you how to get it.

Hint 4 of 6:

Then find something that you can use to hold the rope.

Hint 5 of 6:

Something that will stick to the cage.