Here are the instructions for how a Google Apps admin can integrate Basecamp and Google Drive accounts using Google Apps:

1. Click “Start cloudHQ Setup”:
   
2. Select “For IT Admins: Multiple Users Setup” as the type of sync”:
   
3. Select “Google Apps” as your organization’s cloud platform:
   
4. Click the Basecamp icon or drag it to the left empty box:
   
5. Select the users whose apps you want to sync. cloudHQ will get a list of users from your Google Apps account and ask you which users you want to sync:
   
6. Click the Google Drive icon or drag it to the right empty box:
   
7. Click “Finish”:
   
8. Configuration will be done by cloudHQ:
   
9. Synchronization pairs will be automatically done by cloudHQ:
   
10. Synchronization will start. Here is How to Monitor Status of Sync.