answer:If by dock adapter, you’re referring to the little plastic insert, that’s designed to be placed in speaker docks or other “receiving” ends of units that accept iPods. For example the JBL Onstage III is designed to accept the new iPhone/iPod Touch, but the previous version doesn’t accept the iPod Touch because of its different dimensions. So the little adapter is designed to slip in the dock receiver as a “shim” that allows the iPod Touch to be plugged in to these “iPod” compatible devices. The dock connector cord (the USB/dock cable) is not designed to go through the adapter; you just simply plug it in without the adapter. Hope this is what you’re asking about…if not give some more details and we can go from there.