1) Login to the FieldClimate portal https://ng.fieldclimate.com using your FieldClimate account
2) Enter the User menu
3) Select the API Services sub menu
4) Click on "GRANT ACCESS" in the John Deere Operations Center section
5) Login using your John Deere credentials
6) Select the organization fetched from your John Deere account to use for the sync
7) Select the stations you want to sync by clicking "YES"
Find all steps in more detail with screenshots in the attached document.