Trying to upgrade the Factory Seat Leon double din head unit but am at a bit of a loss.

I went and bought A PC2-75-4 as that's what I was told I needed, since then and having some problems, I was told to get a PC2-85-4.

The Problem: The cable I have powers the head unit ( Pioneer AVH-X8700BT ) but, the radio antenna cable has a power as it's amplified in the FR's which has no where to be plugged in.

Am I missing something, do I have the right cable? Any help is greatly appreciated!