How do you take out the existing speaker wire from the male end of the roswell plug on the tower light/speaker combo.

I want to connect my new speaker wire coming out of the tower to the plug so I can connect it to the tower bar. It looks like it should just unplug but I am not sure how the wiring comes out.

Its the second down on this page

http://www.deutschconnector.com/prod...onnectors.html