You should know this by now Jay!!!
On every plug there is a square section on the side you need to prise that out (see below pictures)
Once that is out, you then need to get a pick of some description in where the pin goes into the plug from the other plug (see pictures)
It's hard to describe but there is a tab inside you need to lever across then the wire will just pull out.
After the wire is out, get the other wire to go in and press it in the same way as you took it out (it needs to go back in the same way round other wise it wont lock) press the square back in job done.
Remember don't go at it like a animal. This works for most if not all the plugs on the car.