Hello

I Have ford e 150 5.8 v8 1988 and i am trying to add another aux battery.
I have isolator with 3 terminals: 1 (Main Battery), A (Alternator) and 2 (Aux battery).

My problem start when i checked for the alternator cables.
It has One big cable that goes for the battery, and another 2 small 16 gauge which i dont know what are they.
anyone knows what are those 2 small cables?
shall i do something with them? connect them to the isolator or leave them?

also in the isolator manual they say this:
http://www.cooperindustries.com/cont...T_180145p1.pdf
Are those the two small cables?

I am sure some people here know somthing about and I realy need help
Thanks guys