Is there a way to add an Attachment to a Payment Process Request (Payment Batch)?

We want to add an FND Attachment to a Payment Process Request (PPR or Payment Batch). We can add attachments to the individual payments within a PPR, but we want to add an attachment to the PPR batch itself.

I don't see a screen from the Payment Manager that lets us add an attachment so I'm trying to figure out if I'm missing it or maybe if there's a way to add it via an OAF Personalization.