Hi.
Many (most) motherboards nowadays feature a M.2 slot with E-key or A+E-Key. The I2C (or SMB) bus of the motherboard is exposed in the pinout of such slot: CLK on pin 60 and DATA on pin58 (and there's an 'ALERT #' signal on pin 62 but normally there isn't such a signal in an I2C bus). Those...