Abstract: An electronic readout assembly in which the readout unit is captured in a frame which is secured in upright display position on a circuit board which in turn is slideably seated in a bracket adapted for utilization mounting, the readout being of the flat plate type having an array of contact prongs projecting from a bottom edge thereof, and the frame having a bottom opening through which the prongs engage with circuit connections on the circuit board. The frame also has open portions which expose the prongs to convenient access for test purposes in a region between the frame and circuit board.