Pic 1 - is a molex and SATA connections. Your SATA connections plug into a HDD or SSD.
Pic 3/4- is USB IO for the case and front panel IO as well like power button, reset, LEDs, headphone and audio. You'll probably want to refer to your motherboard manual to set these.
Pic 5 -Rear IO this is fine, just where you normally plug in your USB etc at the back of the case.
Pic 6 - Your PCIE Slots, for GPU and expansion cards.