radio help

[jdhuggar]

Hi,I'm trying to install a new HU on my wife's 04 vibe and I noticed that there is three connecters back there, a main one, a second one (?) and one for the antenna. Whats the second one for? She doesn't have onstar or anything like that. Can I just hook the main one up to the HU and leave the second one disconnected? Thanks!

[02csnow]

You can leave the second one ( smaller size ) disconnected. Don't take my word on this. But I believe that connector is for a multi disc changer and the wires lead to somewhere in the car.Does your wife's vibe have the upgraded speaker system or just the basic system?