after searching why my After Blaster isn’t working I finally think I found the problem (with help in Musikding Forum).
As I can see on the board, the blue marked holes are connected. And it looks like that the red mark is the way from the trim pot to the switch. Yellow goes to the footswitch and from there to the Output.
Am I right, that the right blue wire should be one pin to the left and the yellow and green wires on the right side should swap places?