I'm not sure what you are trying to achieve (I'm not an OBIEE person). If you are talking about "Calc Manager" rules of Planning you'll not see that in Essbase. It is stored in Calc Manager and replicated in Planning. (Check in Calc Manger -> Planning -> Your application)
You could not have seen the old HBR rules or Calc Manager rules in Essbase. The scripts are generated dynamically based on the prompts and submitted to Essbase as a text. It is never stored in Essbase.
Though there is no connectivity from OBIEE to Planning at the moment, it will be tough to get that interation from OBIEE with Run Time Prompt support.