Refer to page 36 and beyond for general information:
http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/english-syllabus-from2010.pdf
46-48 gives a general outline of what to consider in the Area of Study and Modules/Electives.
For specific information related to Belonging refer to the prescriptions:
http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/english-prescriptions-09-14.pdf
On page 10 you will find the rubric for Belonging. Questions chosen from the HSC always reflect the rubric, as they actually look at the rubric to construct the questions. E.g. With "A sense of belonging can emerge from the connections made with people, places, groups, communities and the larger world." they can ask you on "sense of place" or "connections between people and places" etc. They could link concepts like "How can acceptance and understanding nourish personal growth?" All questions will directly reflect concept/s from the rubric, but they may use synonyms etc. - the key is to create an essay that is detailed yet adaptable enough to focus on practically any (or the majority of) issue/s. You can do this by simply covering a wide range of concepts, and/or interlinking them (e.g. if you link sense of place to identity, then you can easily answer a question that is focused on either). You should be prepared to at least adapt your thesis though, as it's best if you actually answer the question directly.