Get license Number for Customers

Hi Gurus,

I am trying to find out a way to get License number for Customers involved in sale/purchase of Controlled substances.

Here is the scenario -

/SAPSLL/LCLIC is the license header table and  EXTNO field have all customer license numbers.

/SAPSLL/PNTBP is the  Business partner table from where I can get partner number (PARTNER) and Partner GUI id (GUID_PRTN)

Need help in to find a link between tables mentions above. So that if I have a Customer number (or Partner number ) from /SAPSLL/PNTBP I should be able to find the customer license number from  /SAPSLL/LCLIC.

Need this link for master data report, irrespective of transnational data is available or not.

Thanks,

Tanveer