wireing 2 optima battery's

what is the best way to wire 2 optima battery's, 1 battery will be for the truck, and 1 for 2 air zenith's.some one please help got to get my truck back on the road fast..my truck is a 86 chevy c-10,thanks

with mine, i have a yellow top(for accessories), and a red top(engine)...i do have both of mine in the bed though...im using a 200 amp battery isolator between them....basically u run neg. to neg....then run pos. of main battery to big post of isolator...the other big post on the isolator goes to the pos. of the other batt....then there are 2 small post on the isolator...one goes to the ignition wire, and one is a ground....i think u can run without the isolator, but i would not recommend it....it keeps the batteries separate in a way, but lets them stay at a 12 volt...they wont discharge one another if the other is low (they are isolated)..maybe that will help

anyone else,please help just trying to get some idea's. thanks

definately isolators

what size does the alternator wire have to be that goes to the isolator,it is a 140 amp alternator.thanks for yall's help