One step further I've thought of would be to buy two and remove the brass threaded contactor from one of the green hand screws and replace it with a nylon part

One step further I've thought of would be to buy two and remove the brass threaded contactor from one of the green hand screws and replace it with a nylon part so you could screw the dummy unit in to make it appear as though the unit is complete, thereby potential throwing off a savey would-be their who is familiar with the the trick of removing the contractor.