That's the difficult part of the installation. The converter and the scsi2sd have no bespoke brackets.

I was thinking of maybe... Velcro ?

ESD aren't that important with a scsi2sd I think. 

I recall seeing velcro on extension cards of some old dells.

And the bottom of the SCSI2SD Rev5 and the bracket from the conner hd are really flat. Velcro would work quite well on those surfaces. 

The only thing bothering me at the moment is heat: does the scsi2sd heat a lot when used a couple of hours? I dunno, never owned one for now.