For the pc builders that have wiring OCD like your truly, i bring you my 3 piece fan wire covers. these can be used with any 120mm pc fans on your AIO 3 fan or 2 fan with out the center cover. i made these thin enough that you should be able to use your original hardware although the holes may need to be drilled out to allow the fan hardware to pass through, this can be done with a drill bit or razor blade. I recommend mounting the covers on the opposite side of the fan as the radiator as they do sit proud of the fan surface. I used PLA to print these and have seen no thermal warping in the month of testing.
instructions- remove fan hardware from the desired side, place covers over the outside edge of the fans making sure no wires are being pinched, insert fan mounting hardware into the holes on the covers and into the fans and snug them down.