Thank you all for your comments! That box on top of the tank hosts the original speedo/odometer (though with a modified faceplate to make it look older), a water temperature gauge, a digital voltimeter, a USB charger, oil pressure and fuel reserve indicators and 4 military 3-point switches which (when properly set) allow you to start the bike. I hate keys and always use hidden switches instead. This is only 81 combinations, but it's better than a single switch and can be reconfigured easily by opening the box and changing the cable chain configuration :)
Last, but not least. the box has a hinge in the front and a latch in the back so that you can lift it up and refuel. The fuel cap (well, a part of it) is bolted to the bottom of the box, so there are no keys there either.
Overall, it adds to the industrial look (and oddity in general) of the bike.
