Go to the < SFX Setup > tab
Followed by clicking on [ Connect to Xero ] button
Upon clicking, you will be re-directed to Xero login
Upon successfully logging in, you will be asked to allow access followed by connect to Xero org
You have now successfully connected to your Xero org
Following this step, back on the SFX Setup tab, click on [ Select/Change Xero Org ]
Select your Xero Org and click [ Save ]