Show Custom Fields in Post Type AND in Settings

Hi,

I've now purchased Meta Box and try to replace my ACF Configurations.

There is one thing I coulnd't find a solution for, that is showing Custom Fields in the Settings page and under a the Page Post Type.

Background: This is for setting up an image pool, i.e. for the header. So in the settings I usually define a kind of fallback images, in a page post type I can override this with special images only for this page.

I've tried with this, but it doesn't show the fields under a Page:

'settings_pages' => ['image-pool'],
'post_types' => ['page'],

If there is a way to solve this with Meta Box without duplicating all fields?

Regards
Juergen