Add HTML to the Category Description

In the Help Center, I want to add a link (and some other simple HTML) to the description field for just one category (for now). I've read several JS tutorials and examples, but they don't quite fit my situation.

I was able to put my HTML in a placeholder, using Dynamic Content. And I got that to display easily by customizing the "Category Page". But...of course, it is on every page, not just one.

So I'm trying to figure out a way to display my dynamic content on just one particular category page, not all of them. I need some kind of conditional statement or JS. Or....??? 

Hoping someone in Zendesk land can point me in the right direction!