Connect three monitor Final cut pro X

Good morning , a courtesy I need to know a few technical things : if you can not answer me indicates a link to ask these questions ?

I decided to buy an iMac 5k retina

I would like to know if using the program Final Cut Pro X can I connect my monitor is 24 inch Cinema Display is my iMac 27 , 2009 as the target display , so ' I can connect two monitors to the two Thunderbolt ports but I would like to know if one of the two monitor is recognized in the port av output ... and then get a setup like this ( although this is ' configuration with Mac Pro ) ,

Thank You