Looking for values from the output of wmic nic list ... it seems to me that that corresponds to the following Registry tree:
- One of the subkeys (e.g. "0002"; may actually vary per machine) has an entry 0002//NetCfgInstanceId which value is the same GUID you find in LMachine/SOFTWARE/Microsoft/Windows NT/CurrentVersion/NetworkCards/2//ServiceName (1:1 correspondence on my machines; actual GUID may vary per machine/nic)
- The "ServiceName" (wmic) you mention is the 0002/Ndi//Service entry
Just guesswork from a quick scan, but HTH.