How to wire two batteries in Chevy truck?

thinking that you are wiring up a diesel. run 1 pos. cable to the starter, the other to the pos. that you sent down to the starter. Then ground each off your gound wires to the engine or any metal connected to engine. It it also a good idea to run another ground from your trany bell housing to the frame of your truck. Make sure that it is up and out of the way of getting caught on any road hazards. LATER