To connect your Zendesk account to Upzelo, select "Connect" from the Connections screen.
You'll be asked for your Zendesk sub-domain. This is usually your account name in Zendesk e.g. if your account were upzelo.zendesk.com then you'd simply enter upzelo
Once you have entered your sub-domain you'll be directed to Zendesk to approve the connection. If you're not already logged in to Zendesk, you'll be asked to do that first.
Don't forget that if you don't have access to your business's Zendesk account you can always invite a teammate who does have access.