Hey all. I got a friend w/ a 03 cavalier. he wants to install his 2 10's (not sure what) and his amp. I have always done the ghetto method of wiring the power wire around the top of the engine bay and into the passengers door opening (I know I am lazy) My question is. to do it correctly you have to go through the firewall. is there a best way to do this? also where would I route the power wire for a 2003 cavalier. god I sound retarded but I finally need to answer this question. I am tired of doing it wrong.