sangrena

Hi, I need some advice to match my Spider III 4x12 cab with a Krank Rev Jr Pro. The spider cab has two 8ohms inputs running in stereo and the left side input running 4 ohms in mono, my amp has a 16/8 ohms switch, i would like to know if it will be rigth to connect my amp with the swiitch in 8 ohms, to the right side of the spider cab, will this deactivated the left side of the spider cab, letting me use the 8 ohms side of the cab? thanks for your help!