i havent had a need for it on my 545, but the fuse location looks like the 330. on the 330 there is enough room for fuse taps and some open slots as well. the top row was hot all the time and bottom switched[ maybe reversed]. i was able to slip t18 guage zip cord behind the hinge and then route it to the needed loaction.

good luck.

 

Thanks everyone for your help!! I did the aux mod and the sound is great!! Gonna make me use my ipod a lot more!! Thanks my530i, you've been great help!!