WIO Terminal -Can Not locate board in Arduino v2.0.0-rc7

Just purchased a new Wio Terminal , it uses an ATSAMD51P19 processor but I can not find the b find the WIO Terminal or the processor in the board manager. I tried coping the info from the wiki but does not work. I need to a valid name to enter into the board to start up the Arduino IDE for programming. I have Arduino v2.0.0-rc7 IDE
thanks
Tom