The robotics parts arrived earlier this week. I assembled the drivetrain chassis shown in the pictures below.
We are short on screw nuts, so I ordered more which should arrive in a day or two to add more securing between parts. I also tested speed control with the BTS7960 motor shield. I wrote the program such that the wheel speed changes based on the number inputted to the Serial monitor. Last week, I tested information passing between the Jetson Xavier and arduino through Serial.monitor as well and it worked. Hence, integration between the modules is promising.