Chosen Solution
So the flex cable that the battery uses to plug into the ipad ripped off of the battery side. The part that plugs into the 4 slotted plug is good but cant figure out what solder points on the protection board on the battery are the temp and other signal wire. I have figured out which ones are the +- but have yet to find any publications regarding the battery protection circuitry layout/ schematic or anything about the physical battery and not the ipad circuitry which is easily found. In the schematic for the entire ipad itself has the battery connector side information on the ipad side but says nothing about thr actual battery itself.. . Please help!! :)
Update (04/08/2019)
@itrynafixit what I get is from top to bottom:
Pos Swi (single wire interface=stores the battery code and tracks battery readings, including temperature, voltage, current and SoC ) NTC ( NTC thermistor to “control” temperature but this is another story ;) Neg Check with a multimeter if you have continuity between the points marked by a blue arrow and the pads marked green. If so they could be testpoints. If not then check to see if you have continuity between those and neg. That would make them potentially ground connectors. We may find proper schematics if we can identify the battery by anything else but the Apple numbers.
