It should work, but you would either need a set of credentials which is common across all systems (which isn't a best practice) or you would have to change credentials for each deployment task to each system.
1. Go to System Tree and browse to the folder (or create a new one) where you want those systems to be in.
2. Click on "New Systems" button and you should see something like this screen:
Add all of your systems in "Target Systems". Then enter credentials.