so i'm trying to add new fields to show up when you create a new contact, with the name, adress, tax ID ...

so i created a custom module called custom_contact this is my models/contacto.py
 and i changed the contacts_view.xml in the odoo contacts module to use my custom module 

        Contacts

        ir.actions.act_window

        custom_contact.contacto

        kanban,tree,form,activity

        {'default_is_company': True}

            Create a Contact in your address book

            Odoo helps you track all activities related to your contacts.

when i go to create a new contact and i hover on one of the fields i see that Model is : custom_contact.contacto

now how i can add those fields and make them visible

	​
from odoo import models, fields

class Contacto(models.Model):   
_name = 'custom_contact.contacto'    
_inherits = {'res.partner': 'partner_id'}    
_description = 'Contacto'    
   
# Custom fields    
nis = fields.Char(string='NIS')    
nif = fields.Char(string='NIF')    
ai = fields.Char(string='AI')    
rc = fields.Char(string='RC')
partner_id = fields.Many2one('res.partner', required=True, ondelete='restrict', auto_join=True, index=True,        string='Related Partner', help='Partner-related data of the user')

# Inherit existing Many2many fields    
channel_ids = fields.Many2many(comodel_name='res.partner',        relation='res_partner_channel_rel',column1='partner_id', column2='channel_id',        string='Channels')
meeting_ids = fields.Many2many(comodel_name='res.partner',        relation='res_partner_meeting_rel', column1='partner_id', column2='meeting_id',        string='Meetings')