Hi Swarup,
As you mentioned that you have enhanced the Lead Object of the one order data model then you can get the entity from the Lead Root Object. You can use the BOL Programming - method GET_RELATED_ENTITY or GET_RELATED_ENTITIES and get the reference in a CL_CRM_BOL_ENTITY Reference.
From there you can get the properties, and then change or you can even add it in the collection. After that you can set the collection in the typed context of that view.
Since AET node is a part of the Model Node, then in that case I assume that the BOL Programming will be able to add values to that node.
Let me know if you need technical support in terms of coding.
Hope this helps.
Thanks and Regards,
Samantak.
