Listings for different categories

I have a site that has been listed in dmoz under one category for the past several years.

More recently, I've opened a new section of the site under a subdomain that specializes in a different area (car classifieds).

It would seem most appropriate to make a second submission in a new category:

http://dmoz.org/Shopping/Classifieds/Automotive/Classics/

Would this be the right way to approach this?

For classified ads sites, it would be more appropriate to suggest a move of the single listing to a broader category.