Just so you know. I was talking to one of the cell manufacturers recently. He told me that the four tabs on the aluminum cells are only for locating, not for securing to the car. You need two straps going over the top of the cell like you would for a poly cell. Make some up from scrap with insulation between the cell and the straps and secure the ends to crossmembers or the frame. You'll be the talk of the town when other racers see it.