How do I retrieve an attachment UUID?

Scenario...

I'm using Zapier and I wish to retrieve an "attachment UUID" for a certain job in ServiceM8.

EG when I do a GET to api.servicem8.com/api_1.0/job/{{uuid}}.json, I can't find photos attached to that job.

Alternatively, if I do a GET to api.servicem8.com/api_1.0/attachment/.json with a $filter of job_uuid eq {{uuid}}, there is also no "attachment UUID" in the response.

Which area of ServiceM8 should I send my GET to so I can find the "attachment UUID"?

BTW, I'm a newbie, but I know how retrieve data from SM8 via the API, I just need to be pointed in the right direction.