Open the item and enlarge the remote controller. Press the right arrow to turn it over.

Tap to open the lid and insert the battery.

Move to the wall with a wooden door
Enlarge the box on the right.

Check the plate pasted on the box. The pattern drawn is a combination of the symbol buttons of the remote controller.

Press all the symbol buttons used on the plate and press the right button last.

The box will be released so press the switch on the box and get the second fuse from inside.

Move to the wall with the elevator and enlarge the fuse box on the right side.

Fit the 2 fuses that you have obtained and lower the right lever.

You can go to the 2nd floor by taking the elevator and pulling the lever.