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Thanks for your question. If all you want to do is add the fields for manual editing you don’t need the Meta/Template section.
The underscore that starts the field name makes it a “hidden” field, so it will not appear in the dropdown control for the Name field. You can click on the “Enter new field” link just below the control and enter the field name manually. Then, check the boxes for Quick Edit and Bulk Edit to add the field to those areas. Leave the other defaults in place and click “Add Rule” to save your new rule.
I hope that gives you the results you seek. I am marking this topic resolved, but please update it if you have problems or further questions regarding the above suggestions. Thanks for your interest in the plugin.