Sk35 1Z0035456

Hi

My skoda octavia mk2 2007 has the DSP sound system and as expected non original headunits do not work with the amp. 

I've read all the forum posts but I have not come across where the bypass it completely (at least if I look up there doesn't seem to be any). 

Now I have tinkered around with the plugs below the seat where the amp sits and I have had some trouble as it seems the wires all power the speakers in a weird way, the tweeter and speaker fire up together and then the subwoofer also plays high frequency sounds, I'm afraid I might wire it wrong if I bypass the amp. 

I've been trying to look for a wiring diagram but to no avail. I found something which doesn't seem right with my testing in the attachments

So does anyone have a diagram? I can provide more information if needed