1. Connect your iPod to the computer that has the iTunes library you want to transfer the songs to.
2. Open iTunes on the computer.
3. Click the "iPod" icon in the top left corner of the iTunes window.
4. Select your iPod from the list of devices in the left-hand panel.
5. Click the "Music" tab in the main panel.
6. Select the songs you want to transfer to the iTunes library.
7. Click the "Add to Library" button in the bottom-right corner of the iTunes window.
8. The selected songs will be transferred from your iPod to the iTunes library.
Once the transfer is complete, you will be able to access the songs on your iPod in the iTunes library.