RAK7432 connection diagram

Hi,
I’ve been checking the RAK7432’s documentation but it isn’t clear how to use both 4-20mA channels.

Figure 2 in the documentation seems to indicate that both channels must be used to read a single 4-20mA from a pressure sensor, is this right?

On the other hand, I did not find a pinout description so I’m wondering how should N1 and N2 be used.
image

Thanks!