Set them the combinations on the wheels (two examples below).

Find the corresponding combinations on the three remaining wheels using the solution on the first wheel and the connectors found in the sliding puzzle.

Set matching combinations of starts on the lock with eight keys.

Final combination of wheels

Below solution for two examples.

Once you set steering wheels correctly, pulling the upper pin you will discover the arrows which will provide you a hint for the next step

After setting combination for the lock pull the key out.

The arrows on the upper pin are similar to the arrows on the small side buttons.

Pull the middle part of the box to discover the next lock.

The endings of the small side buttons are similar to the (W) and (E)  forms on the box.

There are two symbols which will give you a key to open the lock.

(W) and (E) are representing West and East.