Trying to implement Jekyll Slideshow but unsure of syntax

Trying to implement Jekyll Slideshow but unsure of syntax

I am trying to implement https://github.com/matthewowen/jekyll-slideshow,
however I am unsure of what Matt means in the documention when he says:
For any content that you'd like the slideshow process to work on, use the
filter 'slideshows' in your template, like so:
{{ content | slideshows }}
I am using HTML rather than markdown. My html looks like...
<ul>
<li><img src="assets/images/77_xs650.JPG" alt="Example image" title=""
/></li>
<li><img src="assets/images/650_chop.JPG" alt="Example image" title=""
/></li>
<li><img src="assets/images/sr500.JPG" alt="Example image" title="" /></li>
<li><img src="assets/images/triumph.jpg" alt="Example image" title="" /></li>
</ul>
How do I use the filter 'slideshows' on this data?