I just found this in the "Online payment flow":
Once you return to the CIC site, you will be shown your official receipt. You must print this receipt and fill out by hand the Payer Information Section. Please attach this receipt to your completed application. At this time you may choose to quit or pay more fees.
They sure made that information hard enough to find...
One last question though, I am assuming I leave the "Client ID" Field blank, because I dont think I have a client ID, do I?