For what you are describing you actually do not need to change the config on the target computers. Instead, I would recommend that you leave the config on the target computers as-is. Then in BatchPatch go to ‘Tools > Settings > Windows Update’ and change the ‘Server Selection’ value to ‘Windows Update.’ Then when you initiate a download/install action in BatchPatch, BP will instruct the target computers to check for updates on Windows Update instead of your local WSUS.
I hope this helps.
-Doug