Sharafin,

First you need to identify which cable is your neutral and which is giving out the 1-10v signal.
Info on the cable colors can be found here:
https://www.allaboutcircuits.com/tex...s-infographic/

Neutral connects to the GND port
1-10v wire connects to the 1-10v port

More info on the breakout box can be found here:
https://www.aquariumcomputer.com/dow...ut-box-manual/