Setting up back ups using Snapshot

Hi, I've manage to set up a back up for intelectuk.com with files being archived to Google drive.

I'm now trying to do the same for Durham2021. My question is do I need to set up another web app on Google drive in order to allow Snapshot to archive back ups on to the drive or do I use the same app as I created for Intelect? if I can use the existing app do I need to modify it to include the new site domain? Although I managed to get the first back up working I don't understand it yet, so if you can give me any guidance I would appreciate your help.

Regards Kevin