The installation of the PowerBlockling is very simple: You just have to place the PowerBlockling with its 2×6 female pin header such that it matches the Raspberry Pis GPIO header as shown in the following image:
If you want to you can fasten the PowerBlock in place with the help of the two superimposing mounting holes.
Optionally, you can install an external momentary button and/or an external status LED. The PowerBlockling shows labels for, both, the two button pins as well as for the two LED pins.
If you want, you can solder a 1×4 male pin to the PowerBlockling for an easier connection with a button and LED. The pin header comes with the PowerBlockling.
You attach the USB cable for the power supply directly to the original power supply connector of the Raspberry Pi. The PowerBlockling does not directly switch the power on or off. Instead, it makes use of the standby mode of the Raspberry Pi and, therefore, does not need to directly switch the power.