my car is a 2007 pontiac grand prix GT

ok, i bought 2 rockford fosgate punch p1s and a volfenhag amp..

i hooked the battery, ground, and speaker wires up.. they are all fine

im trying to use a scorche line output converter and i need help.. i hooked it up the way i thought i was supposed to and my sound system just makes a loud buzzing noise and the subs dont work.

i was told to use the wires behind the connector on the rear deck speakers but i dont want to cut them because they are like 1 inch long and if i **** it up im screwed.

i need help


also..what is the black wire coming out of the LOC?