To aid in soldering the new battery in place, be sure the holes through the solder pads on the logic board are clear of solder. This way, you can insert the new battery leads and solder them in place rather than heating the solder pad while simultaneously inserting the battery lead and applying solder.

To open the solder holes, straighten out a staple and push it against the solder blocking the hole while simultaneously heating the same solder pad from the other side of the logic board.

Do not overheat the logic board. If the staple does not make it through on the first try, allow the logic board to first cool down, then reheat the pad. Repeat this process until the staple is pushed all the way through the hole.