Reading the users manual it says to use the motor mount crossmember to jack the rear of the car.....ok so i look at this crossmember and ask myself where on the crossmember should i put the jack. in the center or to the side. on the driver side of that crossmember is a big notched section that i would think would weaken it. dont want to put the jack there do i?What is the purpose of the notch halfway through the creossmember and how much does it weaken (or strengthen )the cross member for jacking?Need help on this one. thanks