TBH I have no idea how you did that... DDC pumps are standardized in size, and the opening on the DDC tops is substantially smaller than what's required for the K1M- which pretty much extends all the way to the edge of the square. The DDC pumps leave like a centimeter of space from the edge. You can see my pictures here:I also got the K1M pump and I was able to use it with the DDC pump top that came with EK DDC 4.2. From what I can tell it was also used here with the Iceman external pump/res. I can’t speak to Magiccube but for my case and what it looks like for the Iceman pump/res as well you just need to screw it in with portions of the screws visible outside. For me I screwed in too hard and broke the four "wings" at the edge of K1M. So I just inserted some thermal pads between the back of the core of K1M and the outer pump housing so that the housing pushes it in when it’s screwed onto the pump top. I hooked it up to a loop and it did not leak. Let me know if anything is unclear. I understand it’s janky for sure.
Unless you physically cut out the top to expand the hole where the pump goes, I don't get how you utilize them together. Bitspower themselves told me it's only for use with their O11 distroplates.So bad news... I got the K1M and Magiccube, they are not compatible:
The pump body is much larger than the opening on the Magic Cube.
Also, found this post, wish I'd Googled for it before buying.