Installing Trailer hitch - avoiding obstruction in axle housing?

[DJS5578]

I know this may be a late post. I’ve researched this problem to the final decision from BRP Warranty department. The final decision from them is: “When INSTALLING the hitch (THEIR BRP trailer hitch assembly) and the solid axle needs to be swapped out for the “hollow” axle, then there is no charge for parts or labor, for the $99 axle and new nut. The BRP hitch unit costs $800. I just told my dealer order me the correct axle and nut ($110 total) and when part/s arrive he would install it for free. I would do it myself, but I want it done by a BRP cert. mechanic so it’s under warranty.