Wifi Kit 32 V2 version?

I bought recently on www.passion-radio.fr this board labelled “Wifi Kit 32 V2” (hence without LoRa)
It works perfectly as the Wifi Kit 32 board but is not exactly the same : for instance, beside the TX pin,! a Vext pin in place of GND pin.
They certify that there is an authentic HELTEC board.
If yes, have you a diagram pin out and a schematic pdf file for this board ?
Thanks.
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