4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors

Thank you so much! Right now I found something like this to attach the disc*. So there is clamping with a set screw, then I drill 4 holes into the disc to attach that. This issue is that there is no additional hole for me to add a spring pin. Could you recommend the name of the component that has this additional hole? Or is there some other component that is better suited? *: https://www.amazon.com/Coupling-Connector-Coupler-Accessory-Fittings/dp/B08335MYGW/144-0621028-2751958?pd_rd_w=CGYzy&content-id=amzn1.sym.aa738fbd-ad05-4d11-aae2-04b598db6305&pf_rd_p=aa738fbd-ad05-4d11-aae2-04b598db6305&pf_rd_r=6QDCGFY5QFWKAMYPJ46W&pd_rd_wg=dMMk1&pd_rd_r=b0aa4fa7-6057-4365-b3bd-a63ace5ce1b3&pd_rd_i=B08335MYGW&th=1