What xml file should I add to layout folder and what is the reference container to add a custom field to the checkout page?

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I created eav attribute. Can you guide me now what xml file should I add to layout folder and what is the reference container to add field in checkout page?

Should it be something like this? I added this to add field in create account form

   <?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceContainer name="form.additional.info">
            <block class="Magento\Framework\View\Element\Template" name="my_form_additional_info_customer" template="MyModules_CustomerMarketingFields::additionalinfocustomer.phtml"/>
        </referenceContainer>
    </body>
</page>