Also... there are 2 large headed silver screws that need to be removed to tip up the motherboard to access the battery connector-The motherboard does not need to be removed- just tipped up to get at the connector. Also there is a brass colored screw that needs to come off with the first black and silver screws, or the frame can not be removed.

The black screws can be difficult: I found a 1.5mm flat head was the only way to unscrew some of them- the torx T5 did not seem to bite.