hi guys, been searching for a while now on a diagram or photo of the plug that goes into the factory amp in a BF GT premium sound. reason being that i need to locate the sub signal wires that go to the amp so i can put them into a hi lo converter, then to an amp and back to a new sub.

i have cut the 4 pairs of speaker wires and wired them into the converter but need to do the same for the sub cables. any help would be much appreciated as its doing my head in haha
cheers guys