I was talking about the client not master server.
I beleive you have NB client installed. If it is windows client bundle.dat is located [C:\Program Files\Veritas\NetBackup\BareMetal\client\data or install location].
PUt the bundle.dat on usb and copy it to master server and run the below command to import it. The below command is for UNIX/LINUX master server, i beleive it would be the same on windows as well just the PATH would be different.
/usr/openv/netbackup/bin/bmrs -op import -res config -client <client_name> -path <path_to>bundle.dat
Hope this helps.