The right fan of our Mac was making an awful noise the whole time, so my son and me, we wanted to get the Mac being quite again!
Thanks to the great manual from ifxit, my son, 12 years old, could replace the right fan, and I was just making sure he was really following the tasks step by step :-)
And we were happy the delivery of the new fan was very quick, it took only 3 days from the US to Switzerland!
Use cups for each type of screws, see our first photo. And use a tape to mark the three disconnected cables, to connect them at the right position again, see our second photo.
MacBook Pro 15" Retina (Mid 2012-Early 2013) Right Fan
Mako Driver Kit - 64 Precision Bits