Funky Cables and SSDs - The 27-inch Apple iMac Review (2011)
Apple iMac 21.5" Mid 2011 Intel Core i5 2.7 GHz 1TB SATA Disk 4GB RAM HighSierra | eBay
Further Explained: Apple's iMac 2011 Model Hard Drive 'Restrictions'
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
Imac A1311 Sata Power Cable | Imac Sata Power Cable 2011 | Cable Ssd Imac 2011 - 1pc Ssd - Aliexpress
Install SSD iMac 2011 - How-To DIY Guide Tutorial
Using a SATA Y Power Split cable instead of OWC's thermal sensor to replace a HDD/SSD on a 2011 iMac - YouTube
FYI IMac 27 inch has 3 active sata ports tested works! - YouTube