A few things need to be answered and researched on your part.
1. I am assuming you have a 4 pin PWM cpu fan connection on your MB since you tried to plug in the floppy cable to it. MB cpu fans are usually 3 or 4 pin and are not molex.
2. Do you have a 4 pin PWM cpu fan? Not the Molex fans you pictured? Picture of a 4 wire PWM fan. ---> CPU FAN
Used for aftermarket coolers.
3. The fans and cables in your picture are 4 pin Molex, which are Case fans and 2 wire, which only need to be plugged into the psu to work. Ignore the yellow wire.---> Molex Fan
4. Do you have a heat sink/cooler for your CPU? I have not seen you mention this. Stock cooler with a 4 wire PWM fan looks something like this. ---> Cooler
This is what should be plugged into your 4 pin cpu fan connection on the MB.
Do some reading (instructions) and research (google) and things should come together.