2011 iMac SATA cable for 2nd hard drive (SSD) under optical drive?

[Glennkaufman]

I ended up designing and 3D printing an insert to take the place of the optical drive and still house a 2nd SSD. The back remains flat like the ODD was, to provide unobstructed airflow to the GPU heatsink. Pay no attention to the drive in there right now, it was just for fitment.

 

[Nguyen Duc Hieu]

View attachment 2172716
I ended up designing and 3D printing an insert to take the place of the optical drive and still house a 2nd SSD. The back remains flat like the ODD was, to provide unobstructed airflow to the GPU heatsink. Pay no attention to the drive in there right now, it was just for fitment.

Awesome!
Although the caddy bay to replace the ODD with 2.5" SSD is sold at 2-3$ each.
Where I live, ordering that 3D print job would cost me at least 10$.