Once you have made your widget, copy the embed code
Copy the code for your widget and go back into the wiki page where you want to embed the widget
Click on edit
Click widgetWidget_Button.png
Click other
Paste the embed or HTML code (from where you made the widget) into this box (make sure the box is blue and you copy using command/ apple V)
Paste_box_for_HTML_code.png
Check the HTML code for the last line. If there is something there that does not relate to your widget, delete this line.
Click save
Click save in the edit mode to check the widget works.