You don't say which Unix/Linux flavor this is but, talking generic Unix, since you are wanting to use ordinary ftp (along with the security issues that might give you) you can use a .netrc file to hold the remote login credentials. Google for .netrc
.netrc must reside in the home directory under which the command will run and have read access only for that user.
Once this is configured properly to can test it interactivley by typing the command:
ftp Test03
(using the node name in your script) and the ftp session should connect immediately if all is well. You can then write your script without userid/passwd concerns.