In the end, the ziptie saved the day (tried to deshroud due to died GPU fan) : r/sffpc
Using cable tie instead of screws to mount case fan. - YouTube
CPU cooling challenge on Supermicro X9SCM-F mobo with Xeon E31220 @ 3.10Ghz and stock passive heatsink with heatsink bracket underneath | TrueNAS Community
Mounting fans with zip ties - Cooling - Linus Tech Tips
Best 140mm extra fan for a Heatsink? | Overclock.net