The center battery connector is more fragile, it does not go thru the board and came off. I was able to connect it to the spot just above and it seems to work.

Other than that I did have trouble with the clips on the right side and damaged the rubber a bit, but it is servicable. The technique and angle for uncliping is still not clear but probably hard to explain - it is a skill.

However, thanks for the best instructions I could find!