I doubt anyone here has ever removed one of those. As near as I can tell, there are two - maybe three connectors that come in from the vehicle and plug into it. If so, the connectors will only go into the appropriate place on the back-side (I think) of the fusebox. It appears to be held on with bolts that go through the mounting bracket that's visible in the (partial, blurry) photo.
If it helps, here is the section on that fusebox from the manual - I didn't see anything else that might help. If the connectors are still there, re-installing the fusebox shouldn't be a huge deal, but will require someone who knows their way around a toolbox...