How to Install a 2.5-inch SSD in the SSD Drive Bay of a 27-inch iMac Mid 2011 (Updated) - YouTube
Amazon.com: OWC SSD Upgrade Kit for 2011 21.5-inch iMacs, Mercury Electra 250GB 6G SSD, 18" SATA III 6Gbps Data Cable, Installation Tools and iMac Screen Adhesive Tape Set : Electronics
Padarsey SSD HDD Hard Drive Cable for iMac A1312 27" 2011 Hard Drive SATA Power Cable 593-1330 - AliExpress
iMac 2011 27” SSD upgrade : r/iMac
OWC Internal SSD DIY Kit for Apple iMac 27" OWCDIDIM27SSD11 B&H
Install SSD iMac 2011 - How-To DIY Guide Tutorial
Upgrading Apple iMac 2011 27 Hard Drive to SSD, Huge Improvement