speedbase/Configuration/TCA/Overrides/sys_template.php

<?php
defined('TYPO3') || die();

use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;

call_user_func(function()
{
    /**
     * Temporary variables
     */
    $extensionKey = 'speedbase';

    ExtensionManagementUtility::addStaticFile(
        $extensionKey,
        'Configuration/TypoScript',
        'speedbase'
    );
});