Yes, those connector symbols are all over the place. Based on the diagram I'd guess the dot in the diagram is a bundle of stubbed purple wires grouped into a crimp connector with lots of black tape around it - someplace.
Not seeing it in my elec. bay. Maybe up behind the parcel shelf bulkhead, maybe somewhere along the center console.
See if your P-wire connector female has 12V and whether the connection is clean and tight. With any luck you won't need to go looking for the dot.