DSP install question.

[Pinchlite]

I was told not to use RCA as this will disable HU volume control.

https://www.crutchfield.ca/S-EpDCGVb...EQ-S1000A.html

Basically where do wires (RED BOX ) go?

https://i.imgur.com/4TjyoIn.png

Could I use same wires that power my headunit to power DSP,Or run seperate designated?

I am using this to improve my android headunit soumd.

Basically this is a pioneer HU without screen.

Here is how I figure it should go...

https://i.imgur.com/vmCcDoQ.png

UPDATE:Just received unit.

The Instructions are vague at best and nobody has done video wiring install/turorial.

My understanding is all the speaker wires run into this unit.NO wires run into the Original headunit,accept the power/ground etc.

My question is how does the headunit know this dsp is even there with no communication between the both?

You would think there would be some sort of communication wire between the both?

Pic i took of wiring https://i.imgur.com/8KVpDHS.jpg

Or do I split all of the speaker wires and run into each unit?