How to identify primary server from secondary in logshipping

Hi ,

I would like to know primary db from secondary db those are located on different servers.

Ex : In Server ABC database name is  test = primary

       In Server DEF database name is  test(Standby\read-only) shows this db is in log shipping also secondary db..

here my question is i know only DEF server don't know ABC server how to find this ABC server or primary DB...

Any idea.... ?