Hint #1
Step 1
There are 2 pawns with a magnetic base in a socket on the sides of the box…
Step 2
Put the pawns with the magnets in the configured sockets...
Step 3
It seems strange that the box has three wooden and one metallic legs…
Step 4
The metallic leg reminds us of a door handle…
Solution
The metallic leg can be turned and can open a kind of a trap door that will give us the key to the side drawer.