ot_typo3/ot_widgets/ext_localconf.php

<?php
defined('TYPO3_MODE') || die('Access denied.');

call_user_func(
    function()
    {
        \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
            'Opentalent.OtWidgets',
            'Events',
            [
                'Event' => 'preview'
            ],
            // non-cacheable actions
            [
                'Event' => '',
            ]
        );

        \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
            'Opentalent.OtWidgets',
            'AllEvents',
            [
                'Event' => 'index,show,noEvents'
            ],
            // non-cacheable actions
            [
                'Event' => '',
            ]
        );

        \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
            'Opentalent.OtWidgets',
            'Donors',
            [
                'Donor' => 'getDonors'
            ],
            // non-cacheable actions
            [
            ]
        );

        \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
            'Opentalent.OtWidgets',
            'Members',
            [
                'Member' => 'getMembers,getMembersCa'
            ],
            // non-cacheable actions
            [
            ]
        );

    // wizards
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig(
        'mod {
            wizards.newContentElement.wizardItems.plugins {
                elements {
                    events {
                        iconIdentifier = ot_widgets-plugin-events
                        title = LLL:EXT:ot_widgets/Resources/Private/Language/locallang_db.xlf:tx_ot_widgets_events.name
                        description = LLL:EXT:ot_widgets/Resources/Private/Language/locallang_db.xlf:tx_ot_widgets_events.description
                        tt_content_defValues {
                            CType = list
                            list_type = otwidgets_events
                        }
                    }
                    donors {
                        iconIdentifier = ot_widgets-plugin-donors
                        title = LLL:EXT:ot_widgets/Resources/Private/Language/locallang_db.xlf:tx_ot_widgets_donors.name
                        description = LLL:EXT:ot_widgets/Resources/Private/Language/locallang_db.xlf:tx_ot_widgets_donors.description
                        tt_content_defValues {
                            CType = list
                            list_type = otwidgets_donors
                        }
                    }
                }
                show = *
            }
       }'
    );
		$iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
		
			$iconRegistry->registerIcon(
				'ot_widgets-plugin-events',
				\TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider::class,
				['source' => 'EXT:ot_widgets/Resources/Public/Icons/user_plugin_events.svg']
			);
		
			$iconRegistry->registerIcon(
				'ot_widgets-plugin-donors',
				\TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider::class,
				['source' => 'EXT:ot_widgets/Resources/Public/Icons/user_plugin_donors.svg']
			);
		
    }
);