Another local schema question...

I have a question about a website that has separate location landing pages. It has one physical location, but services "everywhere", the whole country in question. If I wanted to add a separate piece of schema code to a single location page, what would be the best way to do this in Wordpress. e.g. the homepage already has schema for the service, physical location etc, but if I wanted to add schema to the location page that would target the search term "SERVICE + CITY", what would be the best way to do it, without disrupting the existing schema code. Or is there a way....