Where do I tell S4HC which Print Queue to use?

Our SAP partner migrated most of our old CPM Print Queues to the new CPM for PI last year. I have one queue left to migrate. It is for printing bank checks.

I have created a new Communication User, Communication System, Communication Arrangement, and finally a new Print Queue. I think my next step is to tell S4HC that checks now need to be sent to the new Print Queue.

Where in the system can this be done?

Thanks!

Ralph