Customization: Create an individual Design Tab for a Change Request child object with Action Model

Hello together,

I struggle with the following topic:

I created the child change request Standard Change Request (SCR) out of the parent Change Request (CR).

Now I want to have an individual order of the sections on the Details tab like Affected Objects, Attachments, Associated Process Objects, etc for the SCR. And no I don't mean the attributes layout.

I already found the current action model, which is used for all the change request types: changeRequestInfoPageTabSet

And also the section in the ChangeManagement-actionModels.xml

But when I make changes here, it will be changed for the parent Change Request and also all child objects.

I would suggest the next steps for the SCR are to create
1. a action model name="standardChangeRequestDetailsTab" for the order of the single elements

2. a action model name="standardChangeRequestInfoPageTabSet" for the different tabs

But how do I link now the new created standardChangeRequestInfoPageTabSet with the actual SCR Object? And replace the old action model with the new one?
Or how do I find out where to look?