Technical Details DBField blank but field is updatable - want to use DMT on it

We want to run a DMT the Final Operation checkbox on the Engineering Workbench under Method Of Manufacturing > Operations.

If I look at the technical details, there is an EpiBinding of ECIIor.FinalOpr but no DB Field. I do not see this under ECOOpr in a BAQ or under the DMT.

How do I find what table/field this is for?

In the DMT Template Builder, it also shows me the required fields Plant and ECOGroupID and I dont see those on the ECOOpr table either in a BAQ.

PartRev has the final operation and auto receive fields.

The field is in the assembly table, not the operations table (which is why it’s calculated on the UI). It’s in the DMT under Bill of operations