Suppliers in SAP SRM

Hi Sap Gurus,

We are on SRM 7.01,  can somebody tell me how the relationship between a vendor and Purchasing organization will be maintained.

When i look in to PPOMA_BBP, i can get all the information related to user, porg and Pgroup... like wise in PPOMV_BBP we can get vendor group and vendor information..

but how the relation ship between vendor group and Porg will be maintained.. i tried but i didnt found any clue..

Please throw me some light on this.

Thanks in advance