Reply To: show image when hovering over menu item

[crawling]

I don’t want an image inside the link , just want it to appear on the right when i hover over the menu item .

where do i add this code in wordpress ?

<li class="submenu">
<a href="//www.google.com" target="_blank">
<img src="http://lorempixel.com/70/70/">
</a>
</li>