Given PM 6.3 is several years now (6 years old) - its hard to give an answer without a proper analysis and getting all details of your customization. I would recommend you to create a support SR and work with GCS to give you the right answer.
Please provide as much information as possible of why you want to map the properties and where ? Given OOTB IH properties are auto-mapped when you install PM 7.31 or older.
Also can you consider upgrading to PM 7.4 instead of PM 7.31 - its better always to upgrade to the latest GA.