Conventional current uses the direction in which positive electric charge flows. A moving negative electric charge contributes electric current in the opposite direction to its velocity. Thus Electrons drifting left produce conventional current to the right; the convention describes signed electric charge transport, without requiring positive charge carriers. [ref]
https://openstax.org/books/university-physics-volume-2/pages/9-1-electrical-current. Ling, Sanny and Moebs, §9.1: conventional current direction
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