Depends on what contract your on, for example I was on an 8 hour contract, although in reality I worked about 20 hours a week. Each weeks contracted hours will go into that months pay, but overtime (or additional hours, since you receive the same rate of pay) vary as to what months pay they go into. In general, additional hours worked in the first half of the month will go into that months paycheck, where as additional hours worked in the second half of the month will go into next months paycheck. Ridiculously complicated I know.
In answer to your question though so long as the first load of hours you work qualify for that months pay then you will get it (like everyone else you'll be working with, regardless of length of service) on the last working day of the month. For example the very first month I worked there (October '08) I did 14 hours (including the 2 hour paid induction) and received it all in that months paycheck.
Any problems feel free to message me, after two years of working at the Maxx I 've got their system sussed out. Little tip, keep a record of all the hours you work, so when there's the inevitable pay discrepency you can say "Look, I know how many hours I've worked, why haven't I been paid accordingly?!?". Sorry about the long reply...