The cable connection on the scales will be a headphone type jack leading to a serial connection. That serial connection will then lead to another serial connection ending is a USB connection which can then be plugged into a hub.
There are 3 modes to choose from underneath the scales. These are;
For use with the Touchscreen the mode should be set to scales. Note if you switch to this from another mode the scales may need to be turned off and on again.
Additional note: There is a buzzer setting underneath which can be turned on to confirm to the user when it's turned on