There was a person I felt strong connections. So I wonder if I knew this person from past lives. SR Neptune in the 7th house, square SR nodes. LR Venus in the 7th house, square LR Pluto. Could it be an indication?

The Nodes are not sources of energy like the Planets or Stars, but this is where the paths of the Moon and Sun cross.

You use conjunctions with Nodes only, as far as I am aware of.