This is for spares as the solenoid is broken (resistance checked and is wrong). Removed from a Smeg DI612CA9 Cucina purchased in 2013 and recently stopped working.

I'm including the wiring plug, which is a clip fit to 2 wires.

Mechanism is otherwise ok, so maybe a new solenoid would fix. Also note rinse aid blockage which you may want to clean out.

The Dishwasher Detergent Drawer is specifically designed to fit the SMEG Soap Powder Tablet Dispenser and Rinse Tray. This grey dispenser unit is compatible with the SMEG brand and is suitable for dishwashers. Made in the United Kingdom, this electrical power source item is a convenient addition to your kitchen appliance, providing a hassle-free way to dispense detergent tablets for a sparkling clean dishes.