etc/di.xml
<?xml version="1.0"?>
<!--
~ SOZO Design Ltd
~
~ NOTICE OF LICENSE
~
~ This source file is subject to the Open Software License (OSL 3.0)
~ that is bundled with this package in the file LICENSE.
~ It is also available through the world-wide-web at this URL:
~ http://opensource.org/licenses/osl-3.0.php
~
~ @category SOZO Design Ltd
~ @package Sozo_CurrencyConversionExtended
~ @copyright Copyright (c) 2019 SOZO Design Ltd (https://sozodesign.com)
~ @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0)
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="Magento\Directory\Model\Currency\Import\Config">
<arguments>
<argument name="servicesConfig" xsi:type="array">
<item name="freeCurrencyConverter" xsi:type="array">
<item name="label" xsi:type="string">The Free Currency Converter API (SOZO)</item>
<item name="class" xsi:type="string">
Sozo\CurrencyConversionExtended\Model\Currency\Import\FreeCurrencyConverterApi
</item>
</item>
<item name="openRates" xsi:type="array">
<item name="label" xsi:type="string">OpenRates.io</item>
<item name="class" xsi:type="string">
Sozo\CurrencyConversionExtended\Model\Currency\Import\OpenRates
</item>
</item>
</argument>
</arguments>
</type>
</config>