You need to use correct…
You need to use correct terminology. You used “rocket booster” to describe the SpaceX package for the Roadster and also for the “Raptor Engine” that CyberTruck was hauling.
The term “Rocket Booster” refers to the entire first stage rocket that gets the payload to orbit, so no, they didn’t remove the backseat to install one of those… The backseat has to come out to put in a pressurised air tank, that will get replenished as the car drives. He will use the “cold gas thrusters” from the rocket boosters that help guide the rocket back to earth for landing positioned around the car to allow it to hover and also accelerate to 0-60 in about 1.1 seconds.
You really need to get your facts straight before publishing articles