installing amp and sub in my car need help

[ctom3]

I own a 2013 Ford Mustang with the Shaker 500 factory audio system. this comes with a factory amp in the drivers side kick panel. I have a sub and an amp I would absolutely LOVE to install in my car. The problem is that I have the factory head unit. i’ve been looking through forums and tutorials and the best way I think i’ve found is to use a LOC which I have ordered from kicker. Another problem i’m having is where to connect the LOC at; to the wires coming from the factory amp, the factory head unit or the factory trunk speakers. please help and if there’s any easier ways lmk. 

 

p.s. I don’t have the funds to purchase an aftermarket head unit. 

also the amp will only power the sub. 

[mothra]

just grab signal at the OEM amp. brown + and blue/brown -

[slowfkncar]

Tap off the low level lines from the head unit.

 

 

 

 

[Joshdashef]

If you will be placing the amp in a location besides the factory one then get your signal from the headunit. it will be easier whenever you decide to get an aftermarket headunit.