We have DNN Sharp's Action Form being used by client-partners to post new job listings. The Locations and Categories for these jobs are managed in a little 2sxc apps. We want to extend the ActionForm a little so that the user has the ability to add a new Location or Category when they post the job listing. 

What method/action would I use in Action Form to be able to add a record to Locations or Categories data which are both inside the 2sxc App?