In Customizing "Make payload-specific settings" you have to enter a DDIC-object for your used component / business process / payload type. Where do i know which DDIC-object i have to use?

In my case im using CA-SOA-ESM-ERP-FIN / ICDR001 (or ICDA001, ICDA002) / PRE (or POST). But I don't know which DDIC-Objects are used by FEH / PPO for the payload structure.