Both drawings appear to be the same. Separate the positive line of the plug at the pack and solder to the new question mark cells positive. Solder a jumper from the question mark cells negative to the packs positive cell where you remove the positive plug line, Done

Remember this is a seris circuit and increases the packs voltage but not the capacity. You will not get the same endurance as the 4.8 pack but you probably already know that.


John