I gone ahead and plugged the main board back up the way it was... meaning I don't have anything plugged into J14 or J5. Hopefully, you'll let me know if I need to do anything else.
Now, on to the water tank... I can see that the leak is from the tank as opposed to one of the lines feeding to/from the tank... Question is... can I just replace the tank itself using the lines that are already in place? The new tank came with new lines... but I'm a little unsure about feeding them to there connections under the fridge.