Apply ingest pipeline to custom logs

Hi all.
I have installed a fresh installation of stack ELK.
Into kibana, I have installed a Elastic Agent for get custom logs from a syslog server.
It works fine ad I see the log.
I have make a Ingest Pipeline and I would like to apply this Pipeline (for clean the log) at Custom Logs.
How I can make It?
I have try to write:
pipeline: into Custom configurations of Custom Logs integration but doesn't works.

Thanks to help me

@temuccio Just to be clear. You're asking how to apply your created Ingest Pipeline to your custom logs?