Questions around audio system install -- firewall port, grounding, etc.

[SidneyAks]

I like my music bumpin. I'm not much of a stranger to installing subs, but do have a few questions about my '17 edge sport. I'm looking to install a pair of compact subwoofers under the passenger and driver seats. In order to do that, I need to know a few things. I was hoping someone might have this info handy? If so I'll do a with pictures write up of the entire install process.

 

1.) What does getting a power cable into the cab look like? In my old escape there was a small rubber plug in the drivers foot well I was able to pop out and drill a hole through for the power wire -- is there something for the edge that is similar?

2.) Where does the factory speaker system ground to?

 

3.) Does anyone have a wiring pinout of the connector for the radio? I plan on getting some molex plugs and building a t-tap connector to take audio signals through the center console to underneath each seat, but which can be removed entirely as necessary.