I don’t see the point!? we’ve got a 60/40 seat split, small side down, 2 bikes slide in, front wheels and saddles off, bars turned. Tie down strap to the luggage eyelet thingers to stop them flopping about. you’ve got 2 seats still available, and a load more usable space in the boot compared to that Skoda Space Destroyer set-up.
4 bikes go in on the big side, pedals off. Still got one rear seat.
I’ve got 20mm thru-axle, 15mm, normal QR, 135mm QR, wibbly handlebars, normal ones, and those curly bars they use in the Tour de France; 2.4″ 29ers, Fat, road, and 26″. All need a slightly different position depending on what other bikes are in. If I had something inbuilt, it would need a lot of adjustment, and I’d probably never use it anyway.