Purchase Control Plan Analysis on Handling Units

Hello Experts,

I have a requirement of tracking Purchase Analysis for each Handling Unit that were registered during the Register arrivals process. Currently in the Purchase order Control Plan it is only available to select the Lot/Batch number but not the Handling Unit. Would you be able to provide a work around or am I missing something else in the configuration. For a fact I know that in Inventory Control Plan we can select the Handling Unit but that we have to come through a small configuration to the Lot/Batch enumeration view. 

Thanks in advance.

Kind Regards

Dulip