Go to your Website Manager

Click Edit on the page you would like to insert the code in

If Page says "Do you want to edit the current page which is a Text Page?" Click the button to proceed

Once the editor loads, Click on the HTML button on the menu and choose "Edit HTML"

Click OK on the warning popup

Paste the code in the box where you want to insert the code and click submit

Preview changes (HTML may not show up in Preview)

Click Approve

Go back to Website Manager and publish recent changes.

Go to your website and view the page you inserted to code in.