hi,looking to put mutichanger into a4 cab late 52 reg on back of head unit there is 3 block connectors plus 1 empty for sat nav bottom one appears to be the power connections with top 2 for speakers ,i have noticed that the top connector has no wires in 1 section and looks to me as if its the one to take the blue 8 pin connector seen on most harnesses for sale on ebay etc, has any one chopped this top connector to enable you to link in the changer harness or can you link the wires straight into the empty treminals on this block any ideas regards rick