I would like to get the screen location of one window, and then take those coordinates and move another window to that location. Thanks.
Just for the position, you can get the position of the first window:
pos = self.first.pos().toTuple()
and move the second one there:
self.second.move(*pos)
You can do the same with its size:
size = self.first.size().toTuple()
self.second.resize(*size)