A4 2002 handsfree wiring connection 2002 A4

I am trying to connect a Nokia car kit CK 7W handsfree to my 2002 Audi
A4 , can anyone help with suggestion of which wires to make the
connection to,

instructions state
Black wire to ground - (should be able to sort that out)
Yellow Wire to Mute connection of radio (Audi Concert radion)
Blue wire to IGNS line of car using 1A fuse - where will i find this
and what colour will it be, do i need to strip the cowling off the
steering wheel or can i access this wire elsewhere
Red wire to positive terminal of 12v battery using 2a fuse supplied. -
am i able to connect this somewhere behind the radio or do i have to
wire all the way back to the battery

Appreciate any guiadance you are able to give