SAP orgnisational object type

Dear experts,

What kind of "Business Object type" can be used as "SAP orgnisational object type"?

I would like to create a link between "Orgnisational Unit" to "SAP Orgnisational Object"(ex: company code) using transaction PFOM.

But i can not find "Company code" (BUS0002) in the selection list. The error message shows "BUS0002 is not allowed as a SAP Orgnisational Object type".

So how can I add it as an Orgnisational Object Type"?

Thanks in advance!!!