Filament detection and missing part


I have a BOX and I am upgrading it. I purchased the wifi CPU and the filament detection.

I 3d printed the filament detection enclosure that tiertime provides in the BOX+ 3d printable parts.

However I cannot find this part:

Which is used to attach the PCB to the frame. Where is it?

I could not find any manual either, I found this one in 3dprintersystems thanks to google.

Where can I find that missing 3d printable part?

Now I realise that this part is required only if you use the original Box cpu.

With the new WiFi CPU, this part is not required, it is possible to connect the switch directly to the board.

I replaced the 2 pin connector by a 3 pin connector provided in case you use the Box cpu, and works like a charm.