installing a Nokia Bluetooth CK-7W Car Kit to 2001 golf

hi all im new to this site and love my vw golf. It is a 2001 gt tdi 115 and im going to install a ck7w hands free car kit. My car came with the standard radio and was wondering if someone could give me some help on installing it. There is a red wire which says is to be connected to the battery with a 2amp fuse and a black wire which is to be fitted to ground. However there are two more wires a yellow wire which is to connect to the mute of the radio. i have removed the radio and have located the mute on the soccket at the back, however there is no spade for the wire to go into?? do i have to buy one ?? or is there another way to do this??? there is also a blue wire which says can be connected to the ignition so as when the car is turned on and off so is the phone kit any help would be appriciated,