The assembly of the SmartPis is very easy for practiced hands.
Slide the red side wall with the recesses for USB and the voltage measurement from above into the housing base as shown in figure 2. The second side wall is not yet assembled.
The next step is to place the SmartPi board on the bottom of the housing shell. From above, the spacer bolts are screwed in as shown in Figure 3.
The threads of the spacers are slightly too long.
Shorten the thread with a pair of scissors or pliers to the correct length.
The hole in the upper left of the connection header must remain free, so that the connection cable has sufficient space.
Press the ribbon cable as shown in Figure 5 into the pin header of the SmartPi board.
Now mount the Raspberry Pi onto the spacer using the threaded screws.
The flat ribbon cable is now pressed onto the pin header of the Raspberry Pi.
Finally, the other side part can be pushed into the lower part from above.
Make sure that the slot for the SD card is down. A short check shows whether the side part is installed correctly. For this the slot of the SD card holder must be visible through the housing slot.
Now, press the red upper shell on one side into the lower part and press the upper shell on the other side into the lower part.
Bend the emblems to the outside.
The SmartPi is ready (Figure 7).