How to Install/Upgrade the SSD Card Slot of a 27-inch iMac (Late 2012) on Vimeo
Upgrading old late 2012 iMac to SSD | MacRumors Forums
hard drive - iMac 27" late 2012 SSD upgrade - Ask Different
maxupgrades.com: Single SSD Drives kit for iMac 27 inch 2012 Models with SATA Blade SSD Module / Heatsink/ Power Cable and DATA Cables for [SSD + HDD] with iMac Adhesive LCD Tape
iMac late 2012 SSD Upgrade - Apple Community
How to Upgrade iMac Hard Drive or SSD 2012-2022: EveryMac.com
SSD Upgrade Kits for 27-Inch iMac (2012 - Early 2013)