Did you ever try to mount a SCSI2SD where the old hard drive used to go? The holes don't line up. I created a bracket with a standard hard drive footprint so you can mount the SCSI2SD pretty much anywhere that a hard drive would go. I say "pretty much" because I can't test it on everything. It's simply a bracket with 4 screw holes for the SCSI2SD, and screw holes that line up with hard drive mounting positions. It should fit in about 95% of applications, and in the other 5% it very well could be better than double-sided tape or loose in the case. I also tried to get the connector on the SCSI2SD in the same spot as a SCSI hard drive, so I imagine your existing shorty ribbon cable should reach. 
Includes standard bottom and side-mount hard drive holes. It should mount right where any 3.5" HDD was. 
All 8 screws are included - everything you should need.

The pictures show it mounted on an Amiga A2091 Hard Card, and an A590 (extra standoffs shown - the original cage went missing).
Does NOT include the SCSI2SD, cables, or the controller (shown only as a demonstration).

See this item demonstrated in repair/refurbish videos on my YouTube channel:

My YouTube Channel

Check my eBay store for other useful Amiga items like optical mice, floppy drive emulators, VGA and HDMI adapters!

My eBay Store

Thank you:)