Simple and fast mount of FYSECT ADXL to the FLSUN V400. No need to cut the ADXL's PCB.

It's a tight fit the to fan, so I suggest to print it with “Outside walls first” option set in the slicer, so it's dimensionally correct.

You need:

2x M3 screws, at least 8mm to hold the ADXL to the mount

1x M3x16mm screw, to hold the mount at the bottom, you can use the screw from original the fan cover.

You can keep the ADXL mounted, the airflow is not blocked.