you want lug to lug cables to handle
600 amps?? what battery and generator do you have that supplies 600 amps?
even diesel starters draw less than 600 amps, your truck might take 200 max
try
ASK, as I suggested above, but you better be using 4/0 for your 600 amp system
if the battery to engine ground [not battery to frame] is 2 ga or heavier, than other grounds that go from bolt to bolt, like engine to frame, and frame to cab, can be much lighter because the only really high current draw on a vehicle is the starter, which is why the preferred route for the battery ground post is straight to a starter/bellhousing bolt - the auxiliary ground straps are for accessories, gauges and lighting, which all really ground via the sheet metal
Bill
