Door bar gussets:
A-pillar to window bar support gusseted to the door bar.
Rear x-bar gusseted with the harness bars installed. Notice the passenger harness bar is lower than drivers because the passenger seat can be set lower.
Here you can see the seat mounting brackets.
Here's a look through the windshield opening where you can see how close the half laterals that start on the floor and run along the a-pillars (sides of windshield), bend tightly along the top of the door frame and meet up with the main hoop that is behind the drivers.