Great guide, however I would make one small addition. In the final instructions just a little warning about keeping the heat very low, similar to a hair dryer and take your time. I discovered the hard way that the plastic bezel has quite a low melt/warp temp and I effectively ruined one of the two I was repairing. Sourcing a new digitizer with bezel or bezel alone is proving to be incredibly challenging.
Just curious what the short cable's purpose is? I have a Macbook this model and the battery is not charging. Before I go down the path of changing out the whole board is it worth replacing just this cable?