Pay attention when removing the cluster as not to overstretch the speedo-cable housing. I did make the mistake and had to change the cable (about $100.00 and it took me about an hour).
Pull out the cluster just enough so that your hand can be slipped behind it to unscrew the nut for the cable housing (I found it easier to go behind from the right hand side).
The connectors are designed to go on one way only, difficult to mix them up. :-)
Good luck,

Alex