Path is the path the folder with your files is in. So you type the „IP address or name of your server“/music/FLAC
Mountpoint is the path where your squeezebox server or other extensions can reach your folder, you can just use the example /mnt/share
cifs is the typical network share for Windows systems and nfs typical for Linux. So use the former, usually.
Then in the options you can also copy and paste the example and then change the name and password to the name and password of your network share.