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5. Locate the option for Credit Card Terminal and select into each field to MCS® show the ellipsis. 6. Select PAX S300 or compatible from the drop-down menu. Then, configure the Capture Signature and Port options. When finished, click 7. When finished, select Save & Close.
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9-pin Serial (blue connector) of the PAX Terminal. S300 Serial Cable Dongle. Note: If your dongle is not color-coded, The PAX S300 9-Pin Serial Cable Dongle ensure you connect the cable closest to the power input. Step 3 Connect the Male 9-pin Serial cable to the Female 9-pin Serial to USB adapter (shown in the image in Step 3).