On the MY04 it is a red connector. It is the LOWER of the 2 relays. the one closer to the Hood Release. Try unplugging it then see if with the key 'on' you lose power to the outlets to verify on newer vehicles that this is the same relay. If it is just jumper Terminals 2 to 4 and maybe you can tell everyone else what color the connector becomes on the newer models.
98S, 2014 Impreza 5 dr Ltd (9 Subaru's since 1978, 7 were 5 sp) ILuvSubaru's