SSDs and cubes remind me of the old (yet very, very true) saying - It doesn't have to be pretty, it just has to work. The solution above is what I use in one of my MDDs.
View attachment 2621
With adapter, you're looking at 5x3.25 inches all in, so 12.7 x 8.255 centimeters - cube owners can measure the drive space and see if that solution will fit.
Looking at the solder on your adapter makes me realize why mine was so cheap...