360 has a connector that may prove more difficult to remove

Remove circuit board by removing 5 phillips screws.

Pull the circuit board back.

The connector is glued in place (Why????). I used a thin flat screwdriver blade to carefully scrape the glue off. But you may have to hit it with a heat gun if it doesn't loosen up.

Note, that this connector has three prongs. You will need to get a battery specifically made for Big Blue 360.