I have two kicker comp's 10" and a p2002 amp, then an old kicker comp that is about 300w and a sony xplod amp. I already have the two new kicker comps installed powered from the p2002, but i was wanting to know if i can hook up the old kicker and the sony amp without adding any more b+ wires, or REM wires to the back of the head unit? Thanks in advance.