The Location permission is needed because it enables the Wi-Fi and Bluetooth permissions that are used to set Wi-Fi and for some devices to connect to Bluetooth during install.
Nothing to be alarmed the surfboard Central app is developed with good intentions. Surfboard central is a app which uses mapping technology. The app is designed in such a way that can detect the devices connected to a Gateway or Routers. For detecting the connected and connectable devices nearby the app uses permissions like Wi-Fi ,Bluetooth and Location. The app uses this permissions only when it is necessary.