Wire downside up

Downside up. Special connector Brick for Bricks, emitting signals on connectors in two levels. The signals on the bottom level are transferred to the “normal level” on top.
The wires on top are routed straight. The 4 signals of the bottom connector are transferred to the top, whereupon the 4 signals are routed to 2 contacts each per side. Used for Bluetooth Brick, Arduino, Arduino Nano, I²C PIO 8574, etc.