Those are just parking spot for the RVs.
If the ride goes down during the day and they need to remove some RVs from the ride track, they can quickly move them to these designated parking spots. There are also usually chargers in the floor at these spots.
Then they just add new RVs while the ride is cycling from backstage.
These parking spots are also heavily used if the ride is running at half capacity since there's not enough room backstage to hold all the non-used ones.
Off the top of my head, the parking spots are at:
- When you first encounter the storm troopers and they open fire.
- In AT-AT room in the back near the mirror. Also behind the closing door on track B (side AT-AT).
- In between the cannons.
- End of hallway where the escape pod doors are.