Job Tracker Serial Number Retrieval - Where does data come from?

We have manufacturing jobs that spawn what we call “R” jobs, which we use to track Non-Conformance issues with our manufacturing process.

I’m trying to create a BAQ to identify how many times a manufactured item (we use serial number tracking of all manufactured items), has been sent to a “R” job.  When I pull up an “R” job via Job Tracker, I can see the serial number of manufactured item listed under the Serial Numbers tab.

My question is; Where does the information displayed on the Serial Numbers tab of Job Tracker come from?  If I can find the source of this data, I think I can create my BAQ to display the information I am looking to capture.

Job Tracker Screen:

Job number is R3189, and s/n 1534 was the material to the job and the output of the job

Serial Number Tracker:

Current job number is 323210, but I need to know that s/n 1534 actually went to job R3189 to fix a non-conformance issue.

Any assistance with identifying how Job Tracker is able to display the associated serial number with the “R” job would be appreciated.