Which fan is which on the SN41G2?

I've set up Motherboard Monitor on my freshly-rebuilt SN41G2 system and I was wondering which of the sensors relate to the various temperature and fan speed sensors in the case by default?

I have:
Sensor 1 - 43 degrees
Sensor 2 - 48 degrees (definitely CPU)
Sensor 3 - 44 degrees
Fan 1 - 0 RPM
Fan 2 - 5192 RPM
Fan 3 - 6818 RPM

(All readings are system idling in Windows as I type this.)

Also, the fan speeds are clearly not meant to be 1/1, so does anyone know what the divisors are meant to be for MBM?