I taped one shut and one open. That way, there is till some airflow.
Just turn on the bass and follow the rattle Thats how I finally found them.

-Ken V. 1998.5 SE Praire Tan Zetec ATX psycho_bass@hotmail.com Roush springs Roush rear sway bar BAT struts 17" Millie Miglia HT3 and a ton of subtle asthetic mods