It can't be done automatically; there are too many specifics involved. It's not difficult to do what you ask, but it'll take a few seconds with each clip.
Probably the easiest thing to would be to apply a Hold Frame behavior to each clip. That can be done all at once by SHIFT clicking to select all 400+ clips and then applying Behaviors/Retiming/Hold Frame.
Now you adjust the IN on each clip so that it's on the last frame of the video, and then extend the end of the clip so that it connects with the next clip down the line.