How do I find the relevant documentation for the DIY PRO Indoor Monitor (Pre-Soldered Kit) I purchased?

The documentation relevant to what I bought, “DIY PRO Indoor Monitor (Pre-Soldered Kit)” is very unclear.

Which one of the links do I look at?

There are so many links here Build instructions and I’m not sure what PCB version I have.

Is there an easier way to find documentation specific to my device?

Thanks

You can find the documentation for all Airgradient device versions here: The AirGradient Instructions Overview

Seeing from your post history that your device’s PCB is black, maybe safe to assume it’s version 3.7?