I don't think I have actually ever been to that Forums table of contents shown in the first post. I come in to a page of latest active discussions, and then float the cursor over the tab Forums, at the top of the page. There, the forums are divided into Model Specific, Community, and Technical. Technical always made sense to me. It includes the repair forums, but also Towing.
What I don't understand is why, within the Towing & Hitches forum, there are two subforums (Vehicles, and Hitches), but also posts outside of those two subforums about both vehicles and hitches.