Maybe I'm missing something obvious here, but isn't the point of "Snapping node to..." supposed to do what you ask? Bounding box relates to farther points in four directions of selected object(s). You are free to turn on node snapping and then the relevant snapping points becomes the one closest to mouse pointer at the moment of click event.
Maybe I'm missing something obvious here, but isn't the point of "Snapping node to..." supposed to do what you ask? Bounding box relates to farther points in four directions of selected object(s). You are free to turn on node snapping and then the relevant snapping points becomes the one closest to mouse pointer at the moment of click event.