Blazor is right. They're not cables, they're rails. Notice how they are both in front of AND behind the truck. Also note that if they were cables, based on their location, they'd be unable to pull the truck in a straight line (there'd need to be another cable towards the back of the truck as well). In all likelihood they used the rails for moving the truck, but being able to see the rails isn't a slip-up since they would exist in that location at a real factory of that type.
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