Mapped Network Drive in iTunes

I am trying to get all my iTunes library on a NAS. I have all the files there, and added to iTunes so it shows each file's location in the correct spot. However, under the location for the library it shows blank. When I click change to add it, I run into issues. I have already mounted the network drive by mapping to a network drive using whole smb:// method in Finder, but when I go to iTunes, it doesn't show the mounted drive under Desktop. It shows it under Shared, but when I click it, it says connected as: Guest, instead of admin like I logged in whenever I mapped the drive. If I click this folder, will it be the mapped drive, or mounting it a second time? I just don't want the other way that will auto-eject after a while. Suggestions?