Installation & Wiring of Littelfuse 880051 HD Battery Combiner

I just received a Littelfuse 880051 and it came with only a data sheet and engineering drawing. I have some question that are not answered in these documents.

1. When the “Engine On” input is energized what happens. On other units, it lowers the voltage at which the batteries disconnect. Is that what happens with this unit, and what is that voltage?

2. What does the “Remote” input do and how is it wired

3. What does the “LED” output do and how is it wired

Thank You for your help.