nextcloud/apps/contacts/templates/part.no_contacts.php

<div id="firstrun">
You have no contacts in your list.
	<div id="selections">
		<input type="button" value="Import contacts" onclick="Contacts.UI.Addressbooks.import()" />
		<input type="button" value="Add contact" onclick="Contacts.UI.Card.editNew()" />
		<input type="button" value="Edit addressbooks" onclick="Contacts.UI.Addressbooks.overview()" />
	</div>
</div>