AC AF12025 PWM 120mm Case Fan to Sys_Fan1 Connector on a Gigabyte 880G

Hey, I am new here and I got two Arctic cooling 12025 PWM 120mm fans that I want to use as my outtake fans, but all the fan connector are taken up on my mobo which is Gigabyte 880GA-UD3H and the only left connector is my Sys_Fan1 which is a 4 pin and when I try connecting the fan which is also a 4pin to the sys_Fan1 it does not spin. It gives a jump but does not spin at all. I can't figure how to make it to work. I went into the bios and it shows 0 rpm. How do I click on it? Am I doing something wrong here? anyone know, much appreciated. Also i am not sure what the other wire is for on the case fans and that i don't know where else to connect them since my CPU_Fan, SYs_Fan2, and PWR_fan are used up.

I also want to connect the fan to a Molex to the PSU if that is another option if I can't get it to work as a PWM fan. What connector do I need, any recommendations?