you should have Developer options and usb debugging enabled.
You should be able to see this once you connect your phone with usb cable:
Then you can check the connection by ADB:
However, it you can't see your device. Maybe you are using customised device.
Then you should change android.ini file to put vendor id in (you need ask for vendor id):
0x05e0 is the vendor id for mc40.
after doing that, we need restart adb to make it reload the device:
To find your adb tool and put it in to your system path, you can follow:
run : adb kill-server
run : adb devices
it will restart the adb.