I have an ancient laptop (Toshiba T4400C) that I want to get going. Inside it there are two batteries. One is dead and one I lost. The one that is dead can be rebuilt, I can make a makeshift battery for the one I lost out of AAA batteries instead of AAAA batteries. The battery pack connects to the motherboard with a small connector that goes on only one way. One wire is black and one is red. Would I connect the black wire to the positive and red to the negative or the other way around?