I have a Sennheiser PC151 headset, and a FiiO E10 Olympus dac. I use both the headset and the microphone on the headset, but the problem is I'd like to have the E10 in front of me, on the desk where I can easily adjust it, but in order to do that, I can't have the microphone plugged in because the headset cable separates too far along the cable for me to have either plugged in. I need to separate the part of the headset cable that has both the headphones and microphones cable bound together. I will provide pictures of the part I mean. How do I do that?
Where the cable branches off, near where the cable ends: