Circle position: IO board and lower shell positioning hole and positioning column <br>Box position: lower shell buckle point, IO board needs to be installed below the buckle point
Circle position: IO plate and lower shell positioning hole and positioning column<br>Box position: lower shell buckle point, IO board needs to be installed below the buckle point
Circle position: positioning hole and column of IO board and lower shell<br>Box position: lower shell button point, IO board needs to be installed under the button point