Hi Shauna,
Addresses at the time of enlistment are given in the nominal rolls here:
https://www.awm.gov.au/people/roll-search/nominal_rolls/firs...These addresses have been added to the index at
https://www.aif.adfa.edu.au/searchJust leave the boxes blank and put Howard in the address box. You will need to scroll through the results to find the correct references.