A flux supply unit for supplying a flux to a plurality of surgical instruments may include a plurality of connectors and a user control interface. The plurality of connectors may be configured to supply flux to the surgical instruments when the surgical instruments are operationally coupled to respective connectors. The user control interface may include a continuous display screen including a plurality of graphical display screen sections on the same display screen that display controls for surgical instruments operationally coupled to the plurality of connectors. The plurality of graphical display screen sections may display controls for different types of surgical instruments on the same continuous display screen. The plurality of graphical display screen sections may be arranged relative to the plurality of connectors to visually couple respective graphical display screen sections and connectors to indicate respective associations of the graphical display screen sections with the connectors.