A simple and effective fan mount for MKS Base V1 3d printer board using two 40 mm fan
use some m3 nuts and screws, length depends on the length of your fans. Alternatively you can use zip ties.
I prefer to mount the fans under the part2, but you can also put the fans on top of the part2.
Print with no support, 7% infill for PLA is tested and working properly.
use some m3 nuts or zip-ties, as you wish.