Advertisements The Series 3 I am looking to buy has no cable card slots in the back, however the manual for the Series 3 I downloaded from Tivo shows two slots in the back. Are the slots in another location or are there some Series 3 boxes without CC slots? Would one M card installed in slot 1 give me two tuner functionality or will i need two S cards? Sorry for the newb questions. I just want to make sure I purchase the right TIVO for my needs. Thanx guys.