REST API custom field (radio button) add values - Jira CLOUD


I’m created a new radio buttons custom field using REST API. But I couldn’t find an option to add values to it (I want to add values 1-5). Am I missing something?

Reference I used:

At first I tried the “create issue field option”, it didn’t seem to work, not with “customfield_10039” nor with “10039” as the field key.