Multiple instances of the same Azure Worker Role

Question

So I am lost a bit with having multiple instances of my worker roles.

 

My web role should call a WorkerRole that should handle the Table Storage. I've got 3 instances of that WorkerRole, 1-st and 3-rd instance should take care of Course Object, and 2nd  should take care of Person Object.

 

So basically, I should have 3 instances that are type of Input. And depending on which object I want to pass to TableStorage I should either hit 1st or 3rd for Course, or 2nd instance for Person Object.  

 

My question is, if I connect to the server that I set up on WorkerRole from my WebRole, which instance of that WorkerRole would be hit, will be random, should I have some loop that will tryout connections until it hits the desired instance, or there is a smarter and overall a better solution.

 

So if someone can explain to me how to target the instances of WorkerRole, from my WebRole. 

 

Every kind of advice would be helpful.