The support article for Mac Mini (Late 2012) shows and details which ports can do what.
So you'd probably need to get a Thunderbolt adapter to use a second display, it seems.
See the listed items to connect to Thunderbolt port in the link you posted. I've the same
link bookmarked from more than a year ago...
I have a Late 2012 Mac Mini i7, while only using one Apple Cinema (aluminum) display.
Another option would be also buy a Thunderbolt multiple port dock. Some allow many other
products, & duplicate ports. (Up to 12 items, from USB3.0, Thundebolt, etc) not cheap. A
few displays may allow daisy-chain; note MiniDisplay looks like a Thunderbolt port but may
not act like one. The adapters may allow minidisplay to run from Thunderbolt. See support
article and then refer to Apple store page of display adapters.
http://eshop.macsales.com/shop/Thunderbolt/
OWC also has an external optical drive with several ports built-in (with extra HDD).
Good luck! 🙂