If you launch to modify the Query in 'Query and Report Designer', you will at the top of your Attributes List see the Object that the Query has been build on.
The Object will only exist under the one Module. If you are uncertain of which one have a look in Object Designer. The Module is the folder that the Object exists in.
Thanks, never noticed that before. The Module is easy to figure out but the business object isn't as obvious, until now.