Why not have V'ger launch a log probe while de-rezzing and as the coda see it whiz through space and fall into "what they used to call a Black Hole".

Then have a caption saying "In the 13th Century... Delta Quadrant " and show the probe exit a White Hole and enter the orbit of the Machine Planet (or you could even adapt the temporal distortion effect seen in First Contact.

The location and the time would be enough to link the data to the formation of the Borg and that the probe has fallen backwards in time.

You could add a Borg cube for added fan service if you want.