The RFID reader is in different locations depending on the charger. The majority of chargers have an RFID symbol where you read your badge.
Zaptec – right on the box is a small black round RFID symbol
Charge-Amps AURA – Missing symbol but the reader is just below the symbol that looks like a pyramid in the middle of the charger.
Charge-Amps Halo – Right on the symbol that looks like a pyramid.
CTEK Chargestorm – RFID symbol high up in the middle of the charging box