Need to modify existing ALE of HR to add Non-HR data to it

Hello Experts,

We have 2 SAP systems. System A sends data through ALE/IDOC to System B message type HRMD_ABA. Is there is a way the current system be modify to send more data from System A (table USR02, when particular field got change) to System B. Currently we are sending HR data only.

I am new to ALE world therefore if someone gives steps and details will be greatly appreciated.