If you have the new Tentacle SYNC E, you do not need a cable to setup your Tentacle via App (iOS or Android), just Bluetooth.
In order to have your mobile device speak to your Tentacle via Bluetooth, just download the new Tentacle Setup App for iOS or Android. Open the App, enable Bluetooth on your mobile device and turn on your Tentacle. The App will ask you, if you want to connect via cable or Bluetooth. Choose Bluetooth and press "Add New Tentacle"
All available Tentacle SYNC E boxes will appear on the display. Hold your Tentacle close to the phone and it will highlight on the display, so you know which one it is. Tip on that highlighted Tentacle.
Hold your Tentacle very close to the mobile device and it will connect. When it does, the app will say SUCCESS!
Now you are in the regular Setup interface (which you might know from the Original Tentacle Sync Box). For more information on the Setup options of the App go here.