I would tie it into the shock towers but wouldn't waste my time with teh frame horns. We tie teh buggy cages into the frame horms but that is because we don't have metal bodies on top. It is a PITA to do it in a bug.
I would go with a single hoop behind the front seats and two rear braces that goto plates joined onto the shock towers. If you don't want it to be a 4 seater any more than add a diagonal, but as soo as you do you have to get the seating capacity changed as you have hindered egress to the rear seating area which is illegal.
I wanted to put one in Wes's Baja when I made the support bars for teh V6 install but he wouldn't let me.... maybe one day while he sleeps 😀
Brad
Why copy when you can own an original ?
Meyers Manx Australia