WF-02 cable socket. Number of pins: 2, pitch: 2.54mm. Socket with contacts (plates), you don't have to buy them anymore. In addition, for every 200 pins in the shipment there are 5 additional contacts for free. On my other auctions there are HU-02 plugs for these sockets. Price for 10 pcs.
Catalog note to download: https://tomsyty.pl/datasheets/z/zlacze_2,54mm.pdf