Looking for values from the output of wmic nic list ... it seems to me that that corresponds to the following Registry tree:

LMACHINE/SYSTEM/CurrentControlSet/Control/Class/{4D36E972-E325-11CE-BFC1-08002bE10318}

especially:

• 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.

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