1996 Volvo 850 Trying to put new turn signal bulb socket

[tweets3114]

Hello,
I am doing what looks like a fairly simple repair to my driver's side front turn signal. The socket was corroded and the turn signal not working, so I ordered a new socket, which I received today. My problem is that I cannot get the original socket unplugged. It seems to have a pin that I cannot figure out how to take off. Does anyone know the correct way to unplug the socket? And correct way to plug in the new socket?
Thank you!!

[dosbricks]

Welcome to MVS, tweets. Are you talking about the wiring connector or where the bulb socket plugs into the turn signal housing?