It will be easier to remount the new battery if you tie a string or pliable wire to the retaining bolt at the back side of the tray It has a tendency to slip down and it is hard to reach after you have the battery in. Be very careful and pad the fender you are working over because the battery is a dead weight and you will ding the top of the fender with your elbow. I used several thick, soft towels. After you tighten the retaining bolt make sure the tub fits in perfectly. You might miss the hold down on the back side of the tray and the battery looks like it's right, but the tub will not seat properly (about an inch too tall). Loosen it up and re-position.