Determine what "Role" a Computer object has

For reporting purposes I am trying to retrieve what a computer's "role" is.  We have setup numerous organizational roles to target systems with applications or policies.  Within the console there appears to be the opposite direction where you can select the "role" and see what computers are within it. 

I have thus far been unsuccessful via SQL to determine how the "Roles" organizational container relates back to an individual computer object. 
Does anyone have any suggestions?

Thanks,
Nick