...and here you see how these parts from the last step get assembled.

Now removing the elctronics. There are two shorter screws, careful. Now you can turn it around and lay it so you can resolder the wire. On the foto you can read on the left corner on the electronics-board "sp plus" and "sp minus" so here are the two points for the speaker wiring.

That are the two brown wires here. They are not put through teh holes, just soldered on the backside.