glow gauges problem

I have just joined the forum. I have a 95 saturn sl2 that i'm trying to make sport. I have recently purchased glow gauges but while trying to install them i found dificulty disconecting the wires at the back of the gauge cluster. Can anybody help explain me how those wires disconect?(if it's safe)

IIRC there are one or two huge connectiors right? they can be a bit stiff. -

http://www.spswebpage.com/tech/index.php?articleID=install&sid=cd096a480135583945efee8a4d514c73#white