CDATA Zoho-Excel Plug-In Setup

CDATA Zoho-Excel Plug-In Setup

I downloaded the trial version of CDATA's Zoho-Excel plug-in and am having issue with setup. Specifically, it seems to center on creating a custom OAuth app. Although I'm technically adept, I am not a coder/programmer.

Here's what I do:
  1. I go to register a custom app at accounts.zoho.com/developerconsole and click "Add Client." 
  2. Click "Server Based Applications"
  3. Give it a client name (no problem)
  4. Add my company's homepage URL (no problem)
  5. Authorized Redirect URIs (maybe a problem)
    1. After looking at instructions at  https://www.zoho.com/crm/developer/docs/connectors/set-up.html?src=product&crmprod=1, I used https://deluge.zoho.com/delugeauth/callback
    2. Also, there is a note that says: "Make sure the authorized redirect URI is the same as the one provided while registering your client." What does that mean?
  6. When I go into Excel to use CDATA's connection wizard, I add the OAuth Client ID and OAuth Client Secret (no problem)
  7. It also asks for a Callback URL (problem)
    1. What is this? The note says "The OAuth callback URL to return to when authenticating. (Clear as mud). This value must match the callback URL you specify in your app settings."
    2. Well, I didn't specify a callback URL in the app settings because it didn't ask for one. 
So, I am at a complete loss, and our IT department is apathetic. Any help is appreciated.

Thanks!

John Galich