[FOSDEM] Hotel location with direct connection to FOSDEM

I'd like to book an hotel near the central Grand Place and with direct connection to FOSDEM by tramway or bus. Could anybody suggest the best district [A] and provide me any details about the best transport line [B] ? Thank you [A] Centre nord, Centre sud, Gare du Nord, etc... [B] a link to tramway or bus map may be useful Cordiali Saluti / Kindest Regards / mit freundlichen Grüssen -- Marco Cavallini