Anybody fitted the SAT NAV from HGT in a 1.2 8v or Sporting ie.. is there already a speed wire in the loom or do i need to make one up etc, plus what is the wire type for the connection between the GPS unit and stereo as this is in the wire loom of the HGT so I need to replace this bit.

Thanks

dont know to much about this but i am prety sure there is no speed wire as my stereo had speed volume thing were it gets louder quicker you go to over coem road and wind noise but it dont work as need a wire for it so dint bother