Query related to SLP

Hi Folks,

   I have NBU 7.6.0.2 on Win 2008 with appliance 5230 7.6.0.1.

Planing to create duplication job for DB backups (SQL/Oracle) using SLP. Now the question is , where i have to select the SLP ? In Policy attributes Storage Unit or in the Default Application Schdule(Override). Bcs for database backups, retention will apply dpends on the Default Application Schdule.