Where is the motor in the 42082 Rough Terrain Crane box supposed to be?
YouTuber Swedish Brick put up a nice unboxing video of your set here. 


The motor/battery box seem to be in the white enclosed box, he pulls them both out off camera.






By his video, you will end up with:


26 Bags.

 2 Motors  1 Battery holder, and 1 Motor in a sealed bag.

4 Wheels.

4 Rims.

A sealed instructions bag with 1 sheet of stickers, and 2 large manuals.