Haakon
has an accommodating arse
The cheapest way is a used "normal" tower if thats all you can find https://www.ebay.com.au/itm/284816593538?hash=item4250645282:g:VBsAAOSwJ~digcgO&LH_ItemCondition=4YEs, this was my response as well. Rack needs to switch between two cars, so need same size hitch on both.
All getting to be a bit of annoyance. REally don't want the kid seat in the Maz, but may have to bite the bullet on that one. I did think of roof racks on the Maz, but that's a surprisingly expensive option - well over $1k all up (need to replace the bike carrier I use on the roof of the Suby as it's 10 years old and the shitty plastic bits are degrading). I'd much prefer rear mount rack. Nothing complicated is ever simple...
and some sort of adapter. This one goes on the tongue https://www.amazon.com.au/CURT-4500...ocphy=9072372&hvtargid=pla-499814694637&psc=1
although if it were me id get a tab welded on the square section and bolt it in place of the tounge.