Wow, I've had some horribly bad luck with this project (and my other computer related project of replacing my hard drives in my server with m.SATA cards).
So I apparently ordered the incorrect SATA to PATA adapter, (44pin to SATA, rather than the 40pin that I needed) so I ended up ordering a 40-44pin conversion thing, it finally came so I decided to start doing the Backup/Format/Copy from the Old/New/New, but in the mean time I had upgraded to Windows 10.
Now Windows 7 had weird issues occasionally with my USB -> SATA/IDE adapter before, but as soon as I tried formatting my new drive through Amikit/WinUAE, something menacing happened. Ended up having to reinstall Windows 10 (it was a fresh install, and it's buggy as all hell, but that's for some other story)
Anyhow, in the midst of me trying to fix Windows 10 (which by the way marked my multiple hard drives in my system as not clean, so Linux wouldn't mount them) I bumped the hard drive that was sitting on top of my tower, it was plugged into the wall, but not the computer, so hoping it's still okay (gonna test in a minute here). But it bent the entire SATA connector up, and when I tried (very carefully) to bend it back, sure enough it broke clean off.
I ended up ordering another part, I think this one was less than 10 bucks, so no big deal.
slaapliedje