If whomever you bought it from isn't helpful, you can try calling into eTrailer.com tech support if they don't have your set up on their website. I have to admit, I'm having a tough time visualizing your problem without a picture or drawing. Is it the Reese 4 pin or seven? They have a couple of models of the seven pin that mount direct to their own class ii/iii/iv hitch, but the Curt, I have no idea.