Hoover Vision Hd 9Kg 1600 Goes Bang!?

Unfortunately that sort of information isn't easily found as you've discovered. Most manufacturers don't release wiring diagrams, and many white goods engineers don't even have wiring diagrams because apart from incidents like you describe (which are rare) you virtually never need to use one.

Before going much further though I would make sure that the drum bearings haven't gone. It is quite unusual for a drive belt to just come off for no reason. It can happen, but it is also often caused when the drum pulley starts to move if the drum bearings are wearing or have collapsed. (Has the washing machine been noisy recently?) Sometimes a drum pulley can come loose on its own throwing off the belt. You need to try and establish why the belt has come off because if the drum bearings have gone the washing machine maybe scrap anyway and your search for a wiring diagram becomes unnecessary. Check out this article to see if you can see any reason - belt comes off