Honestly, I never even noticed that there was no output location in the v4 drivers.We always direct everyone to use the v3 so it just never came up.
Open CWIS and go to :
Properties > Services > Printing > Language Emulations > Logical Printer Number > Edit and see if it is set to go to the right middle by default, if it isn't, change it. If it is, see if setting Offset to be Offset per job makes any difference.
If you set a job to offset it will go to the stacker.
To configure the Windows 10 driver (Class driver) you need to go to the Windows store and install the "Xerox Print Experience App"
Directions here. (pdf format)
I have a 570 with an Advanced Office Finisher attached to it. Recently upgraded to the windows 10 driver, like it a lot. However, I cannot change my output from the right top tray to the right middle tray.