first of all, the harness you bought needs to be compatable with your car. on the back of the package it lists the cars its compatible with. nex it comes with a little piece of paper that lists each wire color and its corresponding "meaning" for lack of a better word.
next thing your going to do is look up your head unit wire harness diagram for your EXACT year make and model of your car. take each one of the matches from both and splice them together COLOR DOES NOT MATTER these harnesses are made to fit multiple cars.
the next question is are you installing an amp or not? does your car already contain a factory installed pre existing amp? if so then on your new harness you will notice that some wires are tagged such as the switch power wire and remote wire and such, these controll when your amp turns on and off with the head unit "obviously so that it turns off as well"
yet another question would be are you adding new speakers such as a subwoofer or replacing existing speakers. if so the wiring now needs to bypass the current speakers and go straight to the amp FIRST in order to "AMP" the wattage output to the speaker itself.
next question pertains to the amp if one is in the proceedure. how many "Preouts are on the back of the head unit, a preout is just a fancy word for a set of RCA plugs these plugs take the place of speaker wire from head unit to amp and controll things such as fade front to back left to right and so forth.
but you did get one thing right. that was the antena
but your pictures and question about what to do lack detail. let me know what you want and ill let you know how to install it.
if you have any furthur questions please let me know.