OWC SSD DIY Kit for All Apple 27-inch iMac 2011 Models
SSD Installation Kit for 2011 iMac 27-Inch Models
In-Line Digital Thermal Sensor HDD Upgrade Cable for iMac 2011, (DIDIMACHDD11), Includes cables necessary for drive installation into main drive bay of Apple.., By OWC - Walmart.com
OWC In-Line Digital Thermal Sensor HDD Cable for iMac 2011 (OWCDIDIMACHDD11) for sale online | eBay
HOW TO] iMac 27" (mid 2011) two SSDs in RAID 0 config + HDD | Page 2 | MacRumors Forums
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac