I just purchased 2 Xs power d3400 for my 2007 Tahoe. The 1 d3400 is going to replace the stock battrie now I don't no which terminals to get for the stock wires and 3 power wires and 2 ground wires. Do I need an I-bar? Now I'm assuming the little metal ones will be fine for the 2nd battrie and be able to fit 4 power wires and then 2 on the grounds?