Look at this blog post on installation:

https://safiery.com/blog/lowest-installation-costs/

There are 3 voltage inputs available, 1 High Current Shunt and 1 Battery temperature input.

Configuration Guide

SC301
Main Battery ✔ (internal)
Main Battery Shunt
High Current Dedicated Shunt (like inverter)
Second Starter Battery ✔ Voltage for U1 or U2
Third Battery ✔ Voltage for U1 or U2
Tank with Voltage sensor ✔ Voltage for U1 or U2
Pressure Sensor ✔ Voltage for U1 or U2
AC Current Sensor ✔ Voltage for U1 or U2

Cabin Air Quality
(Either Dust or Co2 Sensor)

✔ Voltage for U1 or U2
Solar Performance Sensor (not solar measurement) ✔ Voltage for U1 or U2
Pitch (Forward and Backwards) ✔ Voltage for U1 or U2
Roll (Sideways) ✔ Voltage for U1 or U2
Current Measurement to 25A per channel (combine channels for greater than 25A circuit)
Tank Measurement Ultrasonic with Resistance input
Temperature Measurement (resistance)
Battery Temperature Included