This sounds like you are using indirect role assignment via HR-OM (or something very similar). Unfortunately, SUIM (RSSCD100_PFCG) would probably only record the assignment done by your SECBATCH, I assume?
In HR-OM I would get the required Information by analyzing the relationships on the HR-object in PP01. I will attach a hardcopy of a HR-Position to which I have attached a role yesterday. The change documents in the HR-object show that I was the one to add this relationship. Of course, this applies to indirect role-assignment using HR-OM only.