Hello MASA,
You are correct, a handle is required for proper competition logistic. It will help the team to pick up the robot quickly, and, in the event when a referee has to pick up the robot for some reason, being able to do it safely without causing any possible damage if doing it otherwise.
You’re free to implement the handle however you see fit, just keeping in mind these scenarios. For example, if you add a difficult to grab handle or it causes the robot to tilt in some way and loose a rescue kit, the referees are not responsible for that and the loose of equipment/configuration/confusing a sensor/etc we won’t be able to re-adjust or reposition any pieces, the robot will resume as is.
Hope this helps in determining the best way to add a handle to your robot 
Diego Garza Rodriguez
2023 Committee