Puzzlerium Tour: LITS (Strings Attached)

It is difficult to not see that this variant bears some similarities with the Outside/First seen variant while allowing the logic to cover a little more terrirory. 

Rules: Shade in some cells such that each outlined area contains four shaded cells that form a Tetromino. No 2×2 square can be shaded completely. All shapes must be connected to form a single contiguous group of shaded cells. Identical figures, regardless of rotation or reflection, cannot share an edge. 

Given letter "A" indicates that the shape in the contained region can be connected to an identical shape in another region with a single straight line that does not turn or encounter any other shape along the way. Multiple connections may exist, but one suffices. Not all possible "A"s are necessarily given.