I contacted Xerox and they sent me an explanation on how this is done. In the case of your printer, it needs to be done via Exception Pages.
Now in order to do this with Connect, you first need to reproduce it with your Postscript driver.
Take any multipage PDF file you have, open it in a PDF reader and print it though the Postscript driver for this printer. have it behave how you expect your job (in your case, page 1 and 2 in duplex and the rest simplex). Once it works, redo the same thing but print it to file (usually, when you print, you will see an option somewhere that says Print to file or Send to file).
That will generate a Postscript file of your job.
Then contact our support and they will be able to provide assistance on how to reproduce this with Connect.