Molex to 12v barrel plug

thingiverse

This also requires two female FRD2 terminals. I don't know how common these are, as I pulled out a terminal set from the early 80s. They may need to be stretched ever so slightly, but fit nicely. No need to snip your case fans' lines. The print shown is the first design I made. It occurred to me that if I flipped it, I could stick it to the wall flat. I have not printed it yet, though it should be fine as well. .2 height at least.