Sub Tap Wires

[downtownva]

Could someone please help me with connecting my SoundGate LOC4.2 to my 2001 BMW X5 with DSP & NAV. I can see the plug that goes into the stock subwoofer. I have on the bottom row of my connector there are 4 blue wires. On the top there is a yellow wire, two brown wires and a blue wire for a total of 5 blue wires and 2 brown wires and 1 yellow wire. This sound gate is a two-channel line converter. How should I wire this? Also, does left and right matter here with regard to the SoundGate and a sub?

One more thing. Were can I tap for a remote wire? Also the battery is in the back under the spare, right?

Thank you very much.

PS. I know this is a lot to ask I just don’t want to mess anything up.

Thank You