iMac Intel 21.5" and 27" (Late 2009-Mid 2010) SSD Temperature Sensor - iFixit
12.7mm 2nd HDD SSD Hard Drive Optical bay Caddy Adapter for SuperDrive 27" 25" 21" inch iMac DVD Late 2009 2010 2011 2012|Laptop Repair Components| - AliExpress
How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com