How to set the destination of a target opened in Compressor?

I can set the setting, name and path of the target using the AppleScript below:


tell application "Compressor"
	make new target of job 1 of front document
	set setting of target 1 of job 1 of front document to setting 1 of setting group 2
	set path of target 1 of job 1 of front document to newPath
	set name of target 1 of job 1 of front document to newNewName
end tell

And it works truly well, but when I tried to set the destination of the target in the same way, it doesn’t work.


set destination of target 1 of job 1 of front document to destination 3

When I click the Run button, It just keep popping out and says that there is something wrong.

P.S. I have only figured out that
destination 1 is “Cluster Storage”
destination 2 is “Desktop”
destination 3 is “Source”
destination 4 is “User’s Movies Folder”

Is there someone so kind to teach me how? Thanks in advance.