Job assigned to PCID

I am working a customization. our production wants to create a new tab in the job entry and add the PCID for that job. so when User put the PCID, I need assign the job to the PCID in PkgControlItem table. in the classic mode, it is super easy. but in Kinetic, I don’t know how to do that. can anyone show me some steps or direction to do that.