It is helpful to lift up gently with a the tapered end of a spudger underneath the tucked-in portion of the battery cable, creating a bit of flex in the cable before pulling on the pull tab. I found that without doing so, the fabric pull-tab simply tore off of the cable under light-to-moderate force (the fabric itself ripped cleanly across, like a paper towel). Careful, gentle pressure with a spudger can be used to remove the plug by prying gently on the rear ridge of the plastic plug (not the wire!) if this happens.

The replacement "Left Bumper Button" part (IF260-016-1) contains the assembly shown in step 22 - the button itself, spring, and plastic bracket it is attached to. The part does not include the daughter board that attaches to the rear face of the plastic bracket, which has the contacts for the d-pad and associated ribbon cable. This is correctly noted on the replacement parts page, and is not a surprise.

What is worth noting here is that the daughter board is a very thin, flexible substrate (~thickness of an index card), and is attached to the rear face of the plastic bracket with adhesive or glue. If only the button itself (and/or spring) replacement is needed, this is not an issue, as the NEW button/spring assembly may be removed from the NEW bracket (which has no daughter board) and attached to the OLD bracket that has the daughter board glued on.

If the bracket itself is broken/damaged, then there are missing steps, as the daughter board would have to be removed/re-glued to the new rear of the bracket.