How to get image file attachments to appear in the result column for a test run step via API

Hi, I'm currently trying to enter test results via the API (using py_jama_rest_client, specifically), and I need to be able to upload screenshot files (pdf) to test runs, and for them to be displayed in the "result" column of one or more specified test steps. I am having a heck of a time trying to get this to work. Maybe it's not supported by py_jama_rest_client, and I need to do with direct API calls. In either case, please advise! Thanks.