Setting up networked hd that has my itunes

Sorry... can someone write out how I can write this into the settings so I can get my itunes synched up with my sonos? Finder image of path is here:

Thanks so much. I don't know what to do with all these \\ options!

OK. This is my first post and the forum won't allow me to post links! How annoying.

The disc is on my airport extreme called Iomega 1.5TB --> iTunes --> iTunes Media --> Music