This video demonstrates how wires and buses can connect to each other.
Wire and Bus junctions in DEX
Track junctions are automatically created at the point where 3 more schematic wires meet.
Bus junction are automatically created when you join a schematic wire to a bus.
Both are automatically deleted if they are no longer deleted.
You can move either one by holding down the left mouse button over the junction and dragging it to its new position.
A Track and bus Junction