The Kitronik Terminal Block Breakout for BBC micro bit is powered via its USB connector, there will be no power at the 3.3V terminal block output connections – this is to provide some overcurrent protection for the BBC micro bit. The BBC micro bit needs to be firmly inserted into the edge connector in the centre of the board. The BBC micro bit can face in either direction and all the terminal blocks will be fully functional. It breaks out all of the signal and power pins on the microbit to user friendly terminal blocks.
Build permanent circuits that you move without worrying about jumper wires becoming detatched.