[daven11]

Are you sure? - from the site https://support.apple.com/en-is/HT4432

Mac mini (Late 2014) Mac mini (Late 2014) does not have user-installable RAM. You can configure the memory in your Mac mini (Late 2014) when you purchase it.

I'd ask over on http://apple.stackexchange.com to get a couple of other opinions to :-)