Does anybody have experience with using Payload Rules together with seeded ADP Celergo interface?

Summary:

My customer is using the seeded Payroll Interface for ADP Global Payroll v2 - consumer ADP Celergo.

We need to exclude certain items from the GPI file, and ADP have advised that we can use Payload Rules on the Oracle side in order to do so.

I have set up a pay load rule for one LDG. I am, however, struggling to find the right way to link the payload rule to the extract definition/flow (or however it needs to be linked) as everything is seeded and very locked down.

Does anybody have experience with using payload rules for this seeded interface? If so, how/where did you link the payload rules to the relevant flow?