[Inkscape-user] centering diagonal line points

I've been working some with inkscape some and I have a problem I'm not sure how to solve. Let me draw a simple diagram:

+----------+ | Box 1 | +----------+ / / +----------+ | Box 2 | +----------+

Is there a way I can exactly line up the end of those points to the center of each box? The top point of the line to the middle of Box 1 and the bottom point to the middle of Box 2.

I didn't know if there was a good way to do this. Any ideas appreciated.

Thanks