Now you should put the upper slider at the front of the box in the appropriate position. When you have decoded all 4 words, you will see those words

Version 1: “Star”, “Ring”, “Lamp” and “Magnet”

Version 2: “Nut” (female screw), “Key”, “Lamp” and “Gear”

As soon as the 4 sliders are placed according to these symbols, the central lock can be removed.

Now we have opened the box and reached the empty compartment.