I bought the computer HP Pavilion 500-315nj and write that they have a sound card powerful HD audio 5.1 with DTS technology to accelerate the sound and the computer has only three connections in the back and pink blue and green and the front two connections microphone and headphones and bought a headset with 4 connections and I need to connect four connections behind the computer how I just connect the four of them if I only have three connections in the back.
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