Speaker wire location on 2018 limited head unit?

[Boostburner]

Hi guys I'm trying to find the speaker wires on my head unit to install a high to low frequency converter for a amp. I tried tapping into the rear transom, but no good sense their hook in series with swim platform

 

[Dave burke]

Do you have a Connext screen?

My head unit is behind the helm and connects to the Connext screen there.

 

[AZMark]

My 2018 limited has 4 channels of RCA outs coming off the Polk box behind the helm. The speaker wires and the remote turn on for an amp are right there too in a big plug.
The unit at the back of the boat is just a remote.

 

[Boostburner]

I don't have any rca on my head unit, but I hear someone makes a harness for the platform unit in the rear, so I'm gonna try that.

 

[AZMark]

I don't have any rca on my head unit, but I hear someone makes a harness for the platform unit in the rear, so I'm gonna try that.

Oh, ya my unit is a Polk not Fusion. Weird they would use different models in the same year.