Mmmm, seems to me the iTunes program files should be left on the SSD. Just the music files themselves should move to the 2TB platter drive.
I'm kinda thinking if you physically drag the "iTunes Media" (older OS version: "iTunes Music") folder to the 2TB, the system might keep track and you don't have to do anything. It depends if the system treats them kinda like one drive. I'm not sure since this setup is new.
If not, you'll get a "copying" window. Then you'll get two sets of stuff, one on each drive . Then trash the one on the solid state. Then everything in iTunes will show an exclamation point. Then select every song, and delete, and "Move to trash" when that option comes up. Then Add To Library, browse to the 2TB drive, select the "iTunes Media" folder, and Add. That will add everything back, but from the 2TB drive, and it will take a while.
Sorry, I'm not sure if you can leave the "Album Artwork" folder on the SSD for speed or if it needs to move as well. I try to embed all my art instead of depending on iTunes.