January 2018
NONE OF THE EXISTING GUIDES (as of Jan 5 2018) details where you've to put your Mass Effect 3 save files to unlock the N7 Mass Effect armor in Dead Space 3. They just tell you to "have Mass Effect 3 save files for you to unlock the N7 armor." Needless to say I was more than a little disappointed. I made my own guide and here it is, a detailed guide on how to redeem the N7 Mass Effect armor in a detailed manner. Hopefully this will help a lot in the EA Origin community:
https://www.youtube.com/watch?v=xuo53e3kCsg
I also left a Google Drive link to my save files just in case you guys have deleted your Mass Effect 3 saves. Just scan the files for malware if you're leery of the saves. They're clean.