studio monitor to computer situation

[Fadymagdy]

Hi guys
i'm about to buy jbl 305 according to good reviews and i will connect it to my Computer without interface and the only cable i can find in radioshake in my town is this https/www.radioshack.com/collections/audio-video-accessories/products/6-y-adapter-audio-cable?variant=5717777477
i will connect rca to this cable but the problem is their will be a additional female plug in every monitor

 

[hang-the-9]

That's not the cable you want. This one http/www.amazon.com/Hosa-CMP159-Stereo-Breakout-10-Feet/dp/B005HGM1D6/ref=pd_bxgy_267_img_2?ie=UTF8&refRID=0J1KZSFRERMKQK5MG044