REST API howto add defects to execution ?

Hi!
Zephyr Squad 7.0.0.70009560, Jira DC v8.20.1

I am creating executions via the REST API, as described here

https://zephyrsquadserver.docs.apiary.io/#reference/executionresource/create-new-execution/create-new-execution

How can I add Defects to the Execution ?

Regards,
Hans