The next three passes must be used to open the leftmost door of the Honey Production Area, leading to Malbee.
How to Acquire
3. The third pass is in a room in the upper half of the top right corner where the locked door is found. First, a crank can be turned, then a switch on the left pressed, revealing a second crank. The second crank can be turned to open the path on the right, beyond an electrified floor, where the pass is held.
4. The fourth pass is found in a room in the upper half of the left side above the locked door. First, an ice block can be used to reach a second drop to create a second ice block. Both then can be used to depress a duo of buttons, granting access to the upper half of the room. Here, an earlier ice drop can be refrozen, breaking one of the ice blocks and opening the door blocking the pass.