I ended up putting it under the right shelf.
I don't like to encourage them to climb very high anyway. It just worries me too much. I'm terrified that they might fall and get hurt... 3 feet is a big distance for a rat. I'm considering making the second level into a full floor sometime in the future.
I'll try to take pics tomorrow. I put the Halloween hammock in already.

I just hope the brats don't have it chewed down by tomorrow.
