How do I define the navigation of two objects according to the proximity of the destination?

Like this? Because this doesn't work. I still don't really understand how to combine events

Ah, that's because the Base instance picked is the one that's overlapping PS.

Try this:

Alternatively, you can save baseID on the PS sprite when it arrives. Then, when a button is clicked, pick PS the same way you pick connected bases.

PS.baseID=Button.connectionA | PS.baseID=Button.connectionB