CKeditor image upload

Found this tutorial: https://h5p.org/adding-text-editor-buttons

implemented all as on tutorial, on Wordpress,  by adding the code into h5p.php in a plugin directory. 

Then uploaded Image and Upload plugins into Ckeditor. 

Added config.plugins += 'image'; into config.js 

Both, image and table option do not show up on create new multiple choice question.