No i mean the CCBill page.
Inside the CCBill panel, under
Account Admin -> SubAccount Info -> Advanced you can specify your Google Analytics id:
After that you'll see inside your Google statistics all the access to the cgi pages of CCBill but, as i said above, i didn't find a way yet to track the path people followed to get there. They seem to appear directly on those pages. CCbill staff didn't really help me a lot, saying i should ask Google...