need help hooking up amp

[325ciDanger]

i'm in the process of hooking up my amp as we speak....from what i've read on here, the white wire from the HK amp on the rear left side is the amp trigger wire, but there are 2 plain white wires both look identical in size...can someone tell me which one to tap? also the speaker wire from the HK amp on the rear deck to tap into for the line level converter, there are 2 gray and two green...which do i tap? one of each? which is positive and which is negative?
PLEASE HELP!!
thank you

[kartele]

you have to meter the white wire to test for 12 volts when your radio is turned on
as for the level converter you can't hook it up at the speakers you have to grab the input wires to the amp unless you have a level converter made for amplified systems
there should be a yellow and a yellow/brown wire inter twined i think they are 14 guage wire

[rome5982]

Here is a link that shows a very detailed wiring diagram of our system. If anything, it can help you with the wire colors. http://forum.e46fanatics.com/showthread.php?s=&threadid=46021