User BelongsToMany Groups pivot table with additional "Role" field, how to select role?

public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\TextInput::make('name')
                    ->label('Username')
                    ->required(),
                Forms\Components\TextInput::make('email')
                    ->email()
                    ->required()
                    ->unique(ignoreRecord: true),
                Forms\Components\TextInput::make('password')
                    ->password()
                    ->required(fn ($livewire) => $livewire instanceof Pages\CreateUser) 
                    ->hidden(fn ($livewire) => $livewire instanceof Pages\EditUser), 
                Forms\Components\TextInput::make('first_name')
                    ->required(),
                Forms\Components\TextInput::make('last_name')
                    ->required(),
                PhoneInput::make('phone_number')
                    ->validateFor()
                    ->defaultCountry('CH')
                    ->required(),
                Forms\Components\TextInput::make('address')
                    ->required(),
                Forms\Components\Select::make('roles')
                    ->relationship('roles', 'name')
                    ->multiple()
                    ->preload(),
                Forms\Components\Select::make('groups')
                    ->relationship('groups', 'name')
                    ->multiple()
                    ->preload(),
            ]);
    }