The use of the word "common" is wrong, and could lead to serious trouble. The Black "hot" conductor from the plug end of the cord should be connected to number 7 (L1) terminal, and jumped to the Common terminal of the relay, number 10. The white (N) conductors from both the plug and outlet ends go to terminal 8. The white is properly called Neutral, not common. Lastly, the black conductor from the outlet end connects to terminal 11, which is the NO side of the relay.
(terminal numbers from Love's online manual)