We are trying to put this amp into our Land Rover and it is actually going to power a sub for the moment until we purchase a new amp. the problem is, there was a professional installation done with the previous owner, but all the wires are left. There seems to be an extra speaker wire and no REM wire. Could this extra speaker wire act as the REM or is there something we're missing?

Car Audio & Video - Kicker - IX254 Car Audio Amplifier