Once the first cage is up on the ledge, climb up and move the cage past the nearest pressure pad. . .
. . . and onto the center pad.
The second cage you'll use is already on the upper level; it's against the back wall, on the left when facing the entrance. Go past it and climb into the alcove next to the vertical chain to find a bronze reward (10/10).
After grabbing the reward, move the cage onto the closest pressure pad.
This unlocks the huge gear on the right wall.
Then stand on the remaining pad. A brief cut scene shows the gear on the left wall unlocking and the exit opening.
[Part 1 | Part 3 | Return to the Bolivia Walkthrough]