Nova - Dynamic set inline relation field

I have one table for categories where the category could be for several different models, e.g. Employee, Client etc and the model is defined by a field called "type". In the type field I will store the model class, e.g. Employee::class. This way I can retrieve and display only the categories for Employees, the category table schema is;

        Schema::create('categories', function (Blueprint $table) {
            $table->id();
            $table->integer('company_id');
            $table->string('type');
            $table->string('name');
            $table->timestamps();
        });

Is it possible to default the type field to Employee when using the showCreateRelationButton method from inside the Nova Employee resource?

Employee Resource;

    /**
     * Get the fields displayed by the resource.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function fields(Request $request)
    {
        return [
            Text::make(__('ID'), 'ident')->sortable(),

            Boolean::make(__('Status'))
                ->default(1),

            BelongsTo::make(__('Category'))
                ->showCreateRelationButton() // SET DEFAULT HERE?
                ->nullable(),                

            Text::make('Name')
                ->sortable()
                ->rules('required', 'max:255'),

            Text::make('Email')
                ->sortable()
                ->rules('required_if:status,1', 'nullable', 'email', 'max:254')
                ->creationRules('unique:users,email')
                ->updateRules('unique:users,email,{{resourceId}}'),

            Text::make(__('Address')),

            Text::make(__('Phone')),

            Color::make('Calendar Colour')
                ->onlyOnForms()
                ->showOnDetail(), 
        ];
    }

Category Resource;

    /**
     * Get the fields displayed by the resource.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function fields(Request $request)
    {
        return [
            ID::make(__('ID')),

            Text::make(__('Name')),

            Select::make(__('Type'))->options([
                'Employee::class' => 'Employee',
                'Client::class' => 'Client',
            ]),
        ];
    }