Heatset insert press baseplate power panel
Jo Presser - Threaded Insert Heat Press power inlet plate for Remixed Base and Front Carriage for Jo Presser baseplate
https://www.printables.com/model/1006597-remixed-base-and-front-carriage-for-jo-presser
i used a switch i had but link to one below and a C8 IEC socket (figure of 8 radio lead) -