Robot Simulation - Power and Free Conveyor with a branch point of a rail

Hello,

Could you advise me about Power & Free Conveyor model?

 

[QUESTION]
In Power & Free Conveyor model, if there is a branch point of the rail (the sections), 
how can the section (a way) be selected in running the simulation on [Robot Simulation] app?

 

[For example]
In the following image, there are 2 options of Trolley's way, because of a branch point. 
How can we select Trolley's way from the 2 options for the simulation?

 

[Caution]
I've already known how to select it in [Conveyor Network] command. 
Today, I'd like to know how to select in running the simulation on [Robot Simulation] app
If exist, could you give me any documents how to select it? 
(Unfortunately, it is not explained in Help Document.) 

 

Sample Data (3DXML)

Sample Data (3DXML)