there are some ways, however the best is to check SM37 and filter for GRAC_ACTION_USAGE_SYNC ABAP Program Name. You will see the list of jobs which was scheduled. You can immediately see the user who created the job. By double clicking on the particular job, you will see the frequency, and you can check the Steps. In the Steps you will see the actual UserID which will run the job, and then by opening the Goto menu and clicking the Variant you will see the actual Variant where you can see what parameters (like connector list) is used to run the job.
Best regards, Mate