Head unit wiring pos and neg

[Ajaz]

Hi, I need to know about the head unit wires in my 61 Reg scirocco. I have had a system in my car. The wires are: Brown and white,
red and white,
red and blue,
brown and blue.
These are in the correct order. These are the ones from within car.

I need to re-connect cables from my rca converter which are:
Solid grey
Grey and black
Solid white
White and black.

I need to know which are pos and neg so I can re-connect so I can work my amp and subs.
SOMEBODY PLEASE REPLY, thanks.

[Roy_01]

Just search for car iso connector and you will find it.