To manually add publication records to your ORCID profile, just click on "Add Manually" under the "Add Works" drop-down menu.
Be sure to select the correct Work Category and Work Type. Once you select "Publication" from the Work Category drop-down menu, you will be presented with a set of options from which you can select in the Work Type drop down menu.
You will also want to be sure to include any unique identifiers for your publication, such as ISBN, DOI, PMID, or other identifier. To do so, just select the type of identifier and input the unique identifier.
Then you can simply fill out the Title and other relevant fields. If you would like your ORCID profile to link to an online record or to your publication, you can include that link in the URL field.