Rockford Fosgate Universal Remote, LOC

Hello, I'm installing some equipment today in my 1999 Ford escort. My dash kit and head unit are ordered but won't be here for a cpl weeks.So until then I'm using my factory head unit (without RCA outputs).I have a LOC (Pac sni-15) but, yesterday I bought a (Rockford Fosgate RFPEQU) 2 channel line driver. I have a jensen octane 600w class d for my 2-kicker 6x9s and a Nemesis NA-3.5kd for my subs (2-10" Polk DB1042 or 1-10" Skar DDX. My 1st question is. Should I use my (PAC LOC) to (RFPEQU) to (amps) using the RCA cables or use the speaker level inputs from 6x9s to the Rockford Fosgate line driver? My 2nd question is if I use my rear 6x9s to get signal for either the loc or the line driver, can I power the same speakers with my amp? If pictures are needed I can upload some if needed. I really appreciate any advice or how to's Thanks, Scott 1999 Ford Escort Factory head unit PAC SNI-15 L.O.C. Rockford Fosgate RFPEQU Jensen Octane 600w 2 ch Nemesis NA-3.5KD Mono Kicker ESC693 x2 10" Polk DB1042 svc x2 10" Skar DDX dvcAscottbain