Replace Odata service in My Inbox using BAS adaptation

[parvathy87]

Hi experts,

I have extended the standard Odata service of MY inbox app using segw. My requirement is to add a new tab using adaptation project . I would hence want to replace the existing base service with my extended service as per the cookbook . While trying to replace the Odata service , I cannot find options in the dropdown.  How can this be achieved? 
slant cookbook for adaptation ui using bas for my inbox standard app?

thanks