Bought a PAC SNI-1 ground loop isolator (ordered online). I'm using a Belkin car charger, and now that I look at it, I probably should have ordered the 3.5" GLI, but I have the RCA version. The way the male/female ends are on the GLI, the "easy" way to plug it in is, I think, backwards, in that the Ipod ends up going to the "output" and and the input goes to the AUX jacks in the center console.

It actually seems to work that way, but since it clearly states that it is directional, I decided to get some old adapters, but now I'm going to end up with a mess of cords. Are these things truly directional in this type of use? Does it hurt to go backwards?