996 amp wiring

[eki912]

I got no replies for my doorspeaker question earlier...

I bet someone must have done it...

Another , getting deeper and deeper.Trying to build a sub....

The amp , on 490 option , is run by this BECKER cdr220 unit. It has a line-out jack. I called a specialist , he said if you have another amp (which I have ) , that line-out is used and you cant use that anymore.

OK , I crawled in to the trunk , pulled the amp & wires. Had a wiring diagram in my hand , and to me it seems that instead of line-out , they have used the speaker outputs to run the amp !!!
So all 4 channels come to amp , and 6 comes out.Does this make any sense at all ?

So I presume , that the line-out option is still available for me to use ?

And : how to take off the unit ?

Thanks for any tips !

e k i