my K20 has dual batteries in it, last summer, i was in need of a battery, and had no time to go get one. so i scabbed the second battery out from under the hood. now, i cant for the life of me figure out how i took it out. here's what i've got. starting with the red cable that runs over the fender, to the junction block on the inner fender... it runs to the pump, so that has to be hot. however the end of it looks like this: and i have another cable that will attach to that end, its about a foot long. do i tie the positive terminals on both batteries together? the second cable runs up to the alternator bracket, and since the truck runs now, i can only assume that that goes to the ground terminal of the second battery. the bottom cable goes to the body of the plow pump, so i think i can safely assume that this is ground. does this all sound correct? i know it was in there before, and im not missing any of the cables. i just want to make sure im putting it back together correctly so that i dont burn the truck to the ground.