adding the UserWay accessibility widget to Moodle

The way to add the accessibility widget for all users, as against only one user, seems to be :
https://docs.moodle.org/311/en/Header_and_footer

I added to the HEAD section at
https://our.server.org/admin/settings.php?section=additionalhtml

and now on the widget appears fine.

Need to check it out and see if it gives something better than the default "accessibility settings" at the bottom left corner built in to Moove theme on Moodle.