Custom Field Choices in custom script ObjectVar

[Zombie-Toad]

I am trying to create a custom script with an ObjectVar field which has the values of one of my custom field choice sets, but I can't figure out how to set the query_params to achieve it.
Is there any documentation how to create such a field?

from extras.models.customfields import CustomFieldChoiceSet
from extras.scripts import StringVar, ObjectVar, IPAddressWithMaskVar, Script

class NewPrinterScript(Script):
    class Meta:
        name = "New printer"
        description = "Creates a new printer"
        field_order = ['name','ip_address','win10driver']
        
    name = StringVar(
        description = "Printer Name"
    )
    ip_address = IPAddressWithMaskVar(
        description = "IP address of the printer"
    )
    win10driver = ObjectVar(
        description = "Windows 10 driver",
        model = CustomFieldChoiceSet,
        query_params={
            'id':2
        }
    )

    def run(self, data, commit):

        return True

[Zombie-Toad]

After a lot of trial an error I came up with this solution:

from extras.models.customfields import CustomFieldChoiceSet
from extras.scripts import ChoiceVar, StringVar, ObjectVar, IPAddressWithMaskVar, Script

class NewPrinterScript(Script):
    class Meta:
        name = "New printer"
        description = "Creates a new printer"
        field_order = ['name','ip_address','win10driver']
      
    win10drivers_list = CustomField.objects.get(id=2).choices
    name = StringVar(
        description = "Printer Name"
    )
    ip_address = IPAddressWithMaskVar(
        description = "IP address of the printer"
    )
    win10driver = ChoiceVar(
        description = "Windows 10 driver",
        choices = win10drivers_list
    )

    def run(self, data, commit):

        return True

I don't know if this is the only way to implement custom field values to custom scripts, but it seems to work.
If there is another or maybe even easier way, please let me know.