4 magnets 6x3mm are needed
https://www.amazon.de/UTOMAG-Multi-Use-Neodym-Magnete-Aufbewahrungs/dp/B08F7HNG45/ref=sr_1_1_sspa?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=S7R80H7WNJ63&keywords=magnete+6x3&qid=1667373692&qu=eyJxc2MiOiIyLjM1IiwicXNhIjoiMi4zNyIsInFzcCI6IjIuMjUifQ%3D%3D&sprefix=magnete+6x3%2Caps%2C144&sr=8-1-spons&psc=1
The author hasn't provided the model origin yet.