Separating Headset Cable

[NotSoHonestAbe]

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:

How I have to have it setup:

 

[Christian Angelo]

Here's a possible idea: extension cable for the mic and then run it to the computer.

http/www.monoprice.com/products/product.asp?c_id=102&cp_id=10218&cs_id=1021813&p_id=5588&seq=1&format=2

 

[NotSoHonestAbe]

I did try that, but it didn't seem to work. Maybe it's a the cable, I don't know.

 

[NotSoHonestAbe]

Update: It turns out the problem wasn't the extension cable, but that the rear panel microphone jack does not work. I have no idea what the problem is.