Value Help with the BPM API for Z tables

Hello,

I am trying this functionality. I have tested with standard BOR objects (so standard search helps). I have defined an ABAP Alias in NWA and the OData Service of the BPM retrieves the values of the search help.

My question is, which is the best way to use search helps of Z tables. Should I create a Z BOR Object in order to create the ABAP Alias in the NWA or there is another way?

thanks,