2006 grand vitara aux cable

Hello all I was just wondering if anybody knows how to wire into the factory aux cable.

For the 2006 factory radio with aux in a 2006 suzuki grand vitara.

The cable is located behind the glovebox and has five wires in a white six pin plug

typical left,right,ground but what does the fifth wire hook up to so I don't fry anything

and my 2007 sx4 suzuki cable is different instead of behind the glove box in 2007 they put it on the radio

Just wanted to know if anybody figured out the scematics on both cars let me know