How to customise output of the CheckboxSelectMultiple in Django. I was being a pleb and didn't quite get it at first

example_checkboxselectmultiple_render.py

### Form, I was originally using a ModelForm, so that's what I shall demonstrate here

class Author(models.Model):
    books = models.ManyToManyField(Book)

class AuthorForm(forms.ModelForm):
    class Meta:
        model = Author

    def __init__(self, *args, **kwargs):
        super(LovelyForm, self).__init__(*args, **kwargs)
        # Overloaded the form widget type here, since this is the only
        # way I could work out how
        self.fields['books'].widget = CheckboxSelectMultiple()
        self.fields['books'].queryset = Books.objects.all()


### HTML for form
{% for value, text in form.books.field.choices %}
<label><input type="checkbox" value="{{ value }}" name="{{ form.books.name }}" {% if value in form.books.value %}checked{% endif %}/>{{ text }}</label>
{% endfor %}