BPC 10.0 SP20 : Internal merger parameters

Hi BPC experts,

I have an issue with merging two entities under a parent entity. I have the following ownership structure :

I would like to merge the entity COCO with DAS. To be more specific, COCO is absorbed by DAS.

So far, I can eliminate COCO but I cannot put COCO's data into DAS.

I followed the document  https://websmp204.sap-ag.de/~sapidb/011000358700000006502012E/PC100NW_IFRS_Scope_case7.pdf for internal mergers parameters but it does not seem to explain how to make BPC understand that COCO's data need to be put into DAS.

Here are other screen shots :

Can anybody help please ?

Thank you in advance.

Dat