How do I create a gallery carousel with oxyextras and meta box gallery?

I have created a custom post type(Gallery) with meta box, and custom field(photos) with meta box field type(image advance).
I am using oxyextras carousel builder and I want the carousel to display the images form a my gallery post called slider.

The carousel content which I selected is meta box gallery, and the data source I selected post id but I can’t seem to find the relevant id to put there.

Please help…


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