Cleaning cars in missions

Vehicles are transferred to the penalty area. There are three of them - each for the city. They are located under the police stations behind the barrier.

Sanchez Ramirez
Is this really about GTA SA?

BDmitriy
Yes, exactly. There may even be a plane that the player controlled. To make it clearer, you can just google "GTA SA impounds".

Sanchez Ramirez
I now need to know how to save the car / bike so that it does not disappear after the cutscene in a certain mission.
And they didn’t transfer to the impound lot, I checked it a couple of times