Hi Indira, You can actually do this through the WP Mobile Menu’s Widgets feature using WordPress’s standard Text widget.
Easiest way to get the code to add to the text widget is by,
1. Start a New Post and add an image to it (Through Add Media).
2. Top right of the Post content area, there’s the “Visual” and “Text” Tab, select the Text Tab.
3. Copy and paste the code into the Text widget. (Don’t add a title to the widget unless you want to see one above the image).
Additional Note – Any image features you add (i.e. Align, Size, Link To) before copying the code will effect the picture in the slider.
The text your adding will look somthing like this,
<a href="https://example-domain.com/wp-content/uploads/2014/04/image-example.png"><img class="alignnone size-full wp-image-756" src="https://example-domain.com.com/wp-content/uploads/2014/04/image-example.png" alt="image-example" width="512" height="512" /></a>
Hope this helps.