I see no such 'silver box' on the unit. The model is KDBS250X5 - Kitchenais Superba 1hp batch processor.
The electrical connection enters from the bottom of the unit. The top of the unit appears detachable from the main body (but not easily). If I detach the unit I will be left with the drain unit that is in the sink and held there with some sort of caulking material.