Dodge Demon Gage Cluster question 1971 vs 1972

Check the other vin numbers. My '72 has one on the radiator support ( drivers side) and is supposed to have one at the rear on the metal of rear package tray ( under rear window on metal where rear radio speakers could be) not exactly sure where. Or possibly in channel of trunk edge of driver side ??? FABO MEMBERs help me out here !!!! My recollection is not real good here.
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