See screenshot. I'm pretty sure that the numberin is different argus vs HWMonitor here. Looks like:
View: https://imgur.com/a/u6gx1nr
- CPU in HWM -> Fan 1 in Argus
- SYS1 -> Fan 3
- SYS3 -> Fan 5
- SYS6 -> Fan 8
View: https://imgur.com/a/u6gx1nr