"There is no step three"... once you figure out you should use the program whose icon is a CD (who uses CDs for music when you have iTunes?) to manage your phone and tablet, neither of which have optical drives.
I don't think the CD metaphor for music is dead yet, but both the iPhone and iPad show the iTunes icon when they need to be connected (i.e. at activation).
The CD icon is the new floppy disc icon.
So eventually the icons don't mean anything and it's all just a game of memory to match up the things that look similar.