IRCAM Spat setup in Cubase 8

Hi. I am attempting to set up IRCAM Spat in Cubase 8. I have a large orchestral template, and would like to send the output of Several group channels, each corresponding to the different instrument families within the orchestra to Individual source inputs within spat. I have instantiated spat on a 6.0 FX channel. However, I am not able to access it’s individual impute from group channel sends or outputs. Any thoughts on how to set this up? Any help would be greatly appreciated. Thank you