Make sure the breadboard is right-side-up so that its 1, 2, 3 row labels are at the top. The 28, 29, and 30 row labels should also be at the bottom.
Set the Edge I/O Adapter on the left side of the breadboard so that:
the adapter pin labeled P0 goes in the (a, 30) breadboard socket
the adapter pin labeled 3V pin goes in the (a, 11) socket
the two adapter pins labeled (+) go in the bus strip (+) column sockets next to the red line
The two adapter pins labeled (-) go in the bus strip (-) sockets next blue line
When you are sure the pins are started in the correct sockets, press down firmly on the edge adapter. The pins should sink all the way into the breadboard -by about ¼ inch.